Add safety check before package pruning

Verifies all state packages are installed locally before running
markAllAsDeps and orphan cleanup.

.agents/skills

@@ -0,0 +1 @@
+../.opencode/skills/

.gitignore

@@ -30,3 +30,6 @@ go.work.sum
 # Editor/IDE
 # .idea/
 # .vscode/
+
+# Binary output
+bin/

.opencode/commands/commit.md

@@ -0,0 +1,5 @@
+---
+description: Make a git commit, asking if it was by the user or AI
+---
+
+skill [name=make-commit] message: $1

.opencode/commands/opsx-fixup.md

@@ -0,0 +1,28 @@
+---
+description: Fixup diverging archived openspec change artifacts
+---
+
+Fixup archived openspec change artifacts in @openspec/changes/archive/ that have diverged from the codebase.
+
+For each archived change directory:
+1. Read the .md artifact
+2. Review related code to verify consistency
+3. Fix any mismatches (status, fields, missing links, etc.)
+
+Only run make-commit if changes were made, with a specific message like "Fixup: add missing X field to Y change".
+
+---
+
+**Steps**
+
+1. **For each archived openspec change**
+
+   Read the change artifact.
+
+   Go through the related code.
+
+   Correct the change artifact where needed.
+
+2. **Run make-commit if changes were made**
+
+   skill [name=make-commit] message: "Fixup: <specific fix>"

.opencode/skills/grill-me/SKILL.md

@@ -0,0 +1,10 @@
+---
+name: grill-me
+description: Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".
+---
+
+Interview me relentlessly about every aspect of this plan until we reach a shared understanding. Walk down each branch of the design tree, resolving dependencies between decisions one-by-one. For each question, provide your recommended answer.
+
+Ask the questions one at a time.
+
+If a question can be answered by exploring the codebase, explore the codebase instead.

.opencode/skills/make-commit/SKILL.md

@@ -0,0 +1,100 @@
+---
+name: make-commit
+description: >
+  Make a git commit, asking if it was by the user or AI. User commits use git
+  config for both committer and author. AI commits use git config for committer
+  but set author to AI Bot <ai@local>.
+license: GPL-3.0
+metadata:
+  author: riyyi
+  version: "1.1"
+---
+
+Make a git commit, distinguishing between user and AI contributions.
+
+---
+
+**Commit message format**
+
+A valid commit message consists of a required **title** and an optional **body**:
+
+Rules:
+- **Title** (required): max 72 characters, starts with a capital letter —
+  unless referring to a tool/project that explicitly uses lowercase (e.g.,
+  "go", "npm", "rustc"). No trailing period.
+- **Body** (optional): any further elaboration. Each line max 72 characters.
+  Wrap manually — do not rely on the terminal to wrap.
+
+---
+
+**Steps**
+
+1. **[REQUIRED] Ask user if this commit is by them or by AI**
+
+   Use the **question tool** to ask:
+   > "Was this commit made by you or by AI?"
+
+   Options:
+   - "By me" - User made the commit
+   - "By AI" - AI made the commit
+
+2. **Compose the commit message**
+
+   If the user did NOT provide a commit message, generate one from staged
+   changes:
+   ```bash
+   git --no-pager diff --staged
+   ```
+   Write a commit message following the format above.
+
+   If the user **DID** provide a message, treat it as raw input and apply the
+   format rules to it.
+
+3. **Validate the commit message**
+
+   Before presenting the message to the user, check it against every rule:
+
+   - [ ] Title is present and non-empty
+   - [ ] Title is at most 72 characters
+   - [ ] Title starts with a capital letter (or an intentionally lowercase name)
+   - [ ] Title has no trailing period
+   - [ ] Every line in the body is at most 72 characters
+
+   Fix any violations silently before showing the message to the user.
+
+4. **Show commit message and confirm**
+
+   Use the **question tool** to ask:
+   > "Is this commit message okay, or would you like to make tweaks?"
+   > ```
+   > <message>
+   > ```
+
+   Options:
+   - "Looks good" - Proceed with this message
+   - "Make tweaks" - User will provide a new message or describe changes
+
+   **If user wants tweaks**: apply the same validation (step 3) to the revised
+   message before committing.
+
+5. **Make the commit**
+
+   For a title-only message:
+   ```bash
+   git commit -m "<title>"
+   ```
+
+   For a message with a body, pass `-m` twice (git inserts the blank line):
+   ```bash
+   git commit -m "<title>" -m "<body>"
+   ```
+
+   Append `--author="AI Bot <ai@local>"` when the commit is by AI:
+   ```bash
+   git commit -m "<title>" [-m "<body>"] --author="AI Bot <ai@local>"
+   ```
+
+**Output**
+
+- Tell user the commit was made.
+- If AI commit, mention that the author was set to "AI Bot <ai@local>".

AGENTS.md

@@ -0,0 +1,31 @@
+# AGENTS.md Guide for Declpac
+
+## Skills: Always Active
+
+At the start of every conversation, load the following skills using the `skill`
+tool before responding to the user:
+
+1. **caveman** — Always use caveman mode (full intensity) for all responses
+
+## Code Organization
+
+### Go: File Structure
+- Variables must appear at the top of each file.
+- Types must appear after variables.
+- Constructors must appear after types.
+- Public (exported) functions must appear after constructors.
+- Private (unexported) functions must appear at the bottom of each file.
+- Within each section, definitions must be sorted alphabetically by name.
+- The sections must be separated by exactly these dividers, filling in the section:
+
+	// -----------------------------------------
+	// <section>
+
+### Go: Line Length
+
+Keep Go lines as short as reasonably possible.
+
+- **Hard limit:** 120 characters — never exceed this.
+- **Preferred:** 100 characters or fewer in normal cases.
+- **Target:** 80 characters if breaking the line produces cleaner, more readable
+  code (e.g. chained calls, long argument lists, multi-condition `if` statements).

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile

@@ -0,0 +1,46 @@
+.PHONY: build fmt fmtcheck vet check githook install uninstall
+
+PKG := github.com/Riyyi/declpac
+BIN := declpac
+BUILD_DIR := bin
+BUILD := $(BUILD_DIR)/$(BIN)
+PREFIX ?= /usr/local
+DESTDIR ?=
+
+STAGED_GO := $(shell git diff --cached --name-only --diff-filter=ACM | grep '\.go$$')
+STAGED_PKGS := $(shell echo "$(STAGED_GO)" | tr ' ' '\n' | xargs -I{} dirname {} | sort -u | sed 's|^|./|')
+
+build:
+	@mkdir -p $(BUILD_DIR)
+	go build -o $(BUILD) ./cmd/declpac
+
+fmt:
+	@gofmt -w cmd pkg
+
+fmtcheck:
+	@if [ -z "$(STAGED_GO)" ]; then exit 0; fi; \
+	unformatted=$$(gofmt -l $(STAGED_GO)); \
+	if [ -n "$$unformatted" ]; then \
+		echo "$$unformatted: unformatted staged file"; \
+		exit 1; \
+	fi
+
+vet:
+	@if [ -z "$(STAGED_GO)" ]; then exit 0; fi; \
+	go vet $(STAGED_PKGS)
+
+check: fmtcheck vet
+
+githook:
+	@mkdir -p .git/hooks
+	@echo '#!/bin/sh' > .git/hooks/pre-commit
+	@echo 'make check' >> .git/hooks/pre-commit
+	@chmod +x .git/hooks/pre-commit
+	@echo "Installed pre-commit hook: .git/hooks/pre-commit"
+
+install: build
+	@mkdir -p $(DESTDIR)$(PREFIX)/bin
+	@install -m 0755 $(BUILD) $(DESTDIR)$(PREFIX)/bin/$(BIN)
+
+uninstall:
+	@rm -f $(DESTDIR)$(PREFIX)/bin/$(BIN)

README.md

@@ -1,9 +1,131 @@
 # declpac
 
-`declpac` syncs a declarative package list with the `pacman` package manager.
+Declarative package manager for Arch Linux that syncs your system with a declared package list using pacman.
 
-## Building
+## Features
+
+- Declarative state management — define your desired package list in files or stdin
+- Explicit package tracking — marks declared packages as explicit (with `--prune`)
+- Smart orphan cleanup — removes packages no longer needed (with `--prune`)
+- AUR support — builds and installs AUR packages automatically
+- Machine-readable output — perfect for scripting
+
+## Installation
+
+### Build from Source
+
+```bash
+git clone https://github.com/Riyyi/declpac.git
+cd declpac
+go build -o declpac ./cmd/declpac
+sudo mv declpac /usr/local/bin/
+```
 
 ### Dependencies
 
-- go
+- Go 1.21+
+- pacman
+- makepkg (for AUR support)
+- git (for AUR support)
+- sudo/doas (root privileges)
+
+## Usage
+
+```bash
+# Single state file
+declpac --state packages.txt
+
+# Multiple state files
+declpac --state base.txt --state apps.txt
+
+# From stdin
+cat packages.txt | declpac
+
+# Preview changes without applying
+declpac --dry-run --state packages.txt
+```
+
+### State File Format
+
+One package name per line, lines beginning with `#` are comments:
+
+```
+bash
+vim
+git
+docker
+# this is a comment
+```
+
+### Implicit State File
+
+If `$XDG_CONFIG_HOME/declpac` (or `~/.config/declpac` on fallback) exists, its
+contents are automatically included in the package list.
+
+### Options
+
+| Flag | Alias | Description |
+|------|-------|-------------|
+| `--state` | `-s` | State file(s) to read package list from (can be used multiple times) |
+| `--nocheck` | | Skip safety check (allow significant package count reductions) |
+| `--dry-run` | | Preview changes without applying them |
+| `--prune` | | Mark packages as explicit and cleanup orphans |
+| `--verbose` | `-v` | Enable verbose output |
+| `--help` | `-h` | Show help message |
+
+## How It Works
+
+1. **Read** — Collect packages from all state files and stdin
+2. **Merge** — Combine into single package list
+3. **Categorize** — Check if packages are in official repos or AUR
+4. **Sync** — Install/update packages via pacman
+5. **Build** — Build and install AUR packages via makepkg
+6. **Mark** (with `--prune`) — Mark declared packages as explicit, all others as dependencies
+7. **Cleanup** (with `--prune`) — Remove orphaned packages
+
+### Database Freshness
+
+If the pacman database is older than 24 hours, it is automatically refreshed.
+
+### Logging
+
+Operation are logged to `$XDG_STATE_HOME/declpac.log`
+(or `~/.local/state/declpac.log` on fallback)
+
+## Troubleshooting
+
+### Package not found
+
+Check if the package exists:
+```bash
+pacman -Ss <package>
+```
+
+### Database sync fails
+
+```bash
+sudo pacman -Syy
+```
+
+## File Structure
+
+```
+declpac/
+├── cmd/declpac/
+│   └── main.go         # Entry point
+├── pkg/
+│   ├── input/          # State file/stdin reading
+│   ├── fetch/          # Package resolution
+│   │   ├── aur/        # AUR support
+│   │   └── alpm/       # ALPM support
+│   ├── pacman/         # Pacman operations
+│   │   ├── read/       # Read packages
+│   │   └── sync/       # Sync packages
+│   ├── log/            # Logging
+│   └── output/         # Output formatting
+└── README.md
+```
+
+## License
+
+GPL-3.0

cmd/declpac/main.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"time"
+
+	"github.com/urfave/cli/v3"
+
+	"github.com/Riyyi/declpac/pkg/auth"
+	"github.com/Riyyi/declpac/pkg/input"
+	"github.com/Riyyi/declpac/pkg/log"
+	"github.com/Riyyi/declpac/pkg/output"
+	"github.com/Riyyi/declpac/pkg/pacman"
+	"github.com/Riyyi/declpac/pkg/pacman/read"
+)
+
+type Config struct {
+	StateFiles []string
+	NoCheck    bool
+	DryRun     bool
+	Prune      bool
+	Verbose    bool
+}
+
+func main() {
+	cfg := &Config{}
+
+	cmd := &cli.Command{
+		Name:  "declpac",
+		Usage: "Declarative pacman package manager",
+		Flags: []cli.Flag{
+			&cli.StringSliceFlag{
+				Name:        "state",
+				Aliases:     []string{"s"},
+				Usage:       "State file(s) to read package list from",
+				Destination: &cfg.StateFiles,
+			},
+			&cli.BoolFlag{
+				Name:        "nocheck",
+				Usage:       "Skip safety check",
+				Destination: &cfg.NoCheck,
+			},
+			&cli.BoolFlag{
+				Name:        "dry-run",
+				Usage:       "Simulate the sync without making changes",
+				Destination: &cfg.DryRun,
+			},
+			&cli.BoolFlag{
+				Name:        "prune",
+				Usage:       "Mark packages and cleanup orphans",
+				Destination: &cfg.Prune,
+			},
+			&cli.BoolFlag{
+				Name:        "verbose",
+				Aliases:     []string{"v"},
+				Usage:       "Enable verbose output",
+				Destination: &cfg.Verbose,
+			},
+		},
+		Action: func(ctx context.Context, cmd *cli.Command) error {
+			log.Verbose = cfg.Verbose
+			return run(cfg)
+		},
+	}
+
+	if err := cmd.Run(context.Background(), os.Args); err != nil {
+		os.Exit(1)
+	}
+}
+
+func run(cfg *Config) error {
+	start := time.Now()
+	log.Debug("run: starting...")
+
+	packages, err := input.ReadPackages(cfg.StateFiles)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		return err
+	}
+	log.Debug("run: packages read (%.2fs)", time.Since(start).Seconds())
+
+	merged, err := input.Merge(packages)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		return err
+	}
+
+	if cfg.DryRun {
+		result, err := read.DryRun(merged)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "error: %v\n", err)
+			return err
+		}
+		fmt.Println(output.Format(result))
+		log.Debug("run: dry-run done (%.2fs)", time.Since(start).Seconds())
+		return nil
+	}
+
+	auth.Start()
+
+	if err := log.OpenLog(); err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		return err
+	}
+	defer log.Close()
+
+	result, err := pacman.Sync(merged, cfg.NoCheck, cfg.Prune)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		return err
+	}
+
+	fmt.Println(output.Format(result))
+	log.Debug("run: sync done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}

docs/AI.md

@@ -4,3 +4,7 @@
 
 First start the background process with `ollama serve`.
 Then open `opencode` run the command `ollama launch opencode`.
+
+## Activate skill explicitly
+
+skill name=make-commit

go.mod

@@ -2,8 +2,8 @@ module github.com/Riyyi/declpac
 
 go 1.26.2
 
-require (
+require github.com/urfave/cli/v3 v3.8.0
-	github.com/Jguer/aur v1.3.0 // indirect
+
-	github.com/Jguer/dyalpm v0.1.2 // indirect
+require github.com/Jguer/dyalpm v0.1.2
-	github.com/ebitengine/purego v0.10.0 // indirect
+
-)
+require github.com/ebitengine/purego v0.10.0 // indirect

go.sum

@@ -1,6 +1,14 @@
-github.com/Jguer/aur v1.3.0 h1:skdjp/P9kB75TBaJmn9PKK/kCeA9QsgjdUrORZ3gldU=
-github.com/Jguer/aur v1.3.0/go.mod h1:F8Awo+WKzTxlXtNOO4pDQjMkePLZ+oMSbu+1fKLTTLo=
 github.com/Jguer/dyalpm v0.1.2 h1:Gl0+GDWBQmo3DSsfzTPnKqCwYqcroq0j6kAtsIUkpUw=
 github.com/Jguer/dyalpm v0.1.2/go.mod h1:FpcWwU1eYHVWMKmr/yHFqHYKsS+qGKCtk/FIXirj2MY=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/ebitengine/purego v0.10.0 h1:QIw4xfpWT6GWTzaW5XEKy3HXoqrJGx1ijYHzTF0/ISU=
 github.com/ebitengine/purego v0.10.0/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/urfave/cli/v3 v3.8.0 h1:XqKPrm0q4P0q5JpoclYoCAv0/MIvH/jZ2umzuf8pNTI=
+github.com/urfave/cli/v3 v3.8.0/go.mod h1:ysVLtOEmg2tOy6PknnYVhDoouyC/6N42TMeoMzskhso=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

openspec/changes/archive/2026-04-17-add-operation-logging/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-15

openspec/changes/archive/2026-04-17-add-operation-logging/design.md

@@ -0,0 +1,46 @@
+## Implementation
+
+### Log File Location
+- Path: `/var/log/declpac.log`
+- Single merged log file (stdout + stderr intermingled in order of arrival)
+
+### State-Modifying Functions (need logging)
+1. `SyncPackages()` - `pacman -S --needed <packages>`
+2. `InstallAUR()` - `git clone` + `makepkg -si --noconfirm`
+3. `MarkAllAsDeps()` - `pacman -D --asdeps`
+4. `MarkAsExplicit()` - `pacman -D --asexplicit <packages>`
+5. `CleanupOrphans()` - `pacman -Rns`
+
+### Functions to Skip (read-only)
+- `DryRun()` - queries only
+- `getInstalledCount()` - pacman -Qq
+
+### Execution Patterns
+
+| Pattern | Functions | How |
+|---------|------------|-----|
+| Captured | All state-modifying functions | capture output, write to log with single timestamp at start, write to terminal |
+
+### One Timestamp Per Tool Call
+Instead of streaming with MultiWriter (multiple timestamps), each state-modifying function:
+1. Writes timestamp + operation name to log
+2. Runs command, captures output
+3. Writes captured output to log
+4. Writes output to terminal
+
+This ensures exactly 1 timestamp print per tool call.
+
+### Error Handling
+- Write error to log BEFORE returning from function
+- Print error to stderr so user sees it
+
+### Dependencies
+- Add to imports: `os`, `path/filepath`
+
+### Flow in Sync() or main entrypoint
+1. Call `OpenLog()` at program start, defer close
+2. Each state-modifying function calls `state.Write()` with timestamp prefix
+
+### Wire into main.go
+- Open log at start of `run()`
+- Pass log writer to pacman package (via exported function or global)

openspec/changes/archive/2026-04-17-add-operation-logging/proposal.md

@@ -0,0 +1,26 @@
+## Why
+
+The tool exits without saving the full pacman output, making debugging difficult
+when operations fail. Users need a persistent log of all pacman operations for
+debugging and audit.
+
+## What Changes
+
+- Add state directory initialization creating `~/.local/state/declpac` if not exists
+- Open/manage a single log file at `/var/log/declpac.log`
+- Instrument all state-modifying exec calls in `pkg/pacman/pacman.go` to tee or append output to this file
+- Skip debug messages (internal timing logs)
+- Capture and write errors before returning
+
+## Capabilities
+
+### New Capabilities
+- Operation logging: Persist stdout/stderr from all pacman operations
+
+### Modified Capabilities
+- None
+
+## Impact
+
+- `pkg/pacman/pacman.go`: Instrument all state-modifying functions to write to log file
+- New module: May create `pkg/state/state.go` or similar for log file management

openspec/changes/archive/2026-04-17-add-operation-logging/tasks.md

@@ -0,0 +1,41 @@
+## Tasks
+
+- [x] 1. Create state module
+
+Create `pkg/state/state.go`:
+- `OpenLog()` - opens `/var/log/declpac.log` in append mode
+- `GetLogWriter()` - returns the raw log file writer (for MultiWriter)
+- `Write(msg []byte)` - writes message with timestamp + dashes separator
+- `Close()` - closes the file
+
+- [x] 2. Wire into main.go
+
+In `cmd/declpac/main.go` `run()`:
+- Call `OpenLog()` at start
+- `defer Close()` log
+
+- [x] 3. Instrument pkg/pacman
+
+Modify `pkg/pacman/pacman.go`:
+
+Each state-modifying function writes timestamp ONCE at start, then captures output:
+- Write `timestamp - operation name` to log
+- Run command, capture output
+- Write captured output to log
+- Write output to terminal
+
+**Functions updated:**
+- `SyncPackages()` - write output with timestamp
+- `CleanupOrphans()` - write output with timestamp
+- `MarkAllAsDeps()` - write operation name with timestamp before running
+- `MarkAsExplicit()` - write operation name with timestamp before running
+- `InstallAUR()` - write "Cloning ..." and "Building package..." with timestamps
+- Error handling - `state.Write([]byte("error: ..."))` for all error paths
+
+- [x] 4. Add io import
+
+Add `io` to imports in pacman.go
+
+- [x] 5. Test
+
+Run a sync operation and verify log file created at `/var/log/declpac.log`

openspec/changes/archive/2026-04-17-batch-pacman-checks/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-14

openspec/changes/archive/2026-04-17-batch-pacman-checks/design.md

@@ -0,0 +1,137 @@
+## Context
+
+Currently, `pkg/pacman/pacman.go` uses subprocess calls to query pacman for package existence:
+- `pacman -Qip <pkg>` to check local DB (per package)
+- `pacman -Sip <pkg>` to check sync repos (per package)
+
+For n packages, this spawns 2n subprocesses (up to ~300 for typical package lists). Each subprocess has fork/exec overhead, making this the primary performance bottleneck.
+
+The AUR queries are already batched (single HTTP POST with all package names), which is the desired pattern.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Eliminate subprocess overhead for local/sync DB package lookups
+- Maintain batched AUR HTTP calls (single request per batch)
+- Track installed status per package in PackageInfo
+- Provide dry-run output showing exact packages to install/remove
+- Handle orphan cleanup correctly
+
+**Non-Goals:**
+- Parallel AUR builds (still sequential)
+- Custom pacman transaction handling (use system pacman)
+- Repository configuration changes
+- Package download/compile optimization
+
+## Decisions
+
+### 1. Use Jguer/dyalpm for DB access
+
+**Decision**: Use `github.com/Jguer/dyalpm` library instead of spawning subprocesses.
+
+**Rationale**:
+- Direct libalpm access (same backend as pacman)
+- Already Go-native with proper type safety
+- Supports batch operations via `GetPkgCache()` and `PkgCache()` iterators
+
+**Alternatives considered**:
+- Parse `pacman -Qs` output - fragile, still subprocess-based
+- Write custom libalpm bindings - unnecessary effort
+
+### 2. Single-pass package resolution algorithm
+
+**Decision**: Process all packages through local DB → sync DBs → AUR in one pass.
+
+```
+For each package in collected state:
+  1. Check local DB (batch lookup) → if found, mark Installed=true
+  2. If not local, check all sync DBs (batch lookup per repo)
+  3. If not in sync, append to AUR batch
+
+Batch query AUR with all remaining packages
+Throw error if any package not found in local/sync/AUR
+
+Collect installed status from local DB
+(Perform sync operations - skip in dry-run)
+(Mark ALL currently installed packages as deps - skip in dry-run)
+(Then mark collected state packages as explicit - skip in dry-run)
+(Cleanup orphans - skip in dry-run)
+Output summary
+```
+
+**Rationale**:
+- Single iteration over packages
+- Batch DB lookups minimize libalpm calls
+- Clear error handling for missing packages
+- Consistent with existing behavior
+
+### 3. Batch local/sync DB lookup implementation
+
+**Decision**: For local DB, iterate `localDB.PkgCache()` once and build a map. For sync DBs, iterate each repo's `PkgCache()`.
+
+**Implementation**:
+```go
+// Build local package map in one pass
+localPkgs := make(map[string]bool)
+localDB.PkgCache().ForEach(func(pkg alpm.Package) error {
+    localPkgs[pkg.Name()] = true
+    return nil
+})
+
+// Similarly for each sync DB
+for _, syncDB := range syncDBs {
+    syncDB.PkgCache().ForEach(...)
+}
+```
+
+**Rationale**:
+- O(n) iteration where n = total packages in DB (not n queries)
+- Single map construction, O(1) lookups per state package
+- libalpm iterators are already lazy, no additional overhead
+
+### 4. Dry-run behavior
+
+**Decision**: Dry-run outputs exact packages that would be installed/removed without making any system changes.
+
+**Implementation**:
+- Skip `pacman -Syu` call
+- Skip `pacman -D --asdeps` (mark all installed as deps)
+- Skip `pacman -D --asexplicit` (mark state packages as explicit)
+- Skip `pacman -Rns` orphan cleanup
+- Still compute what WOULD happen for output
+
+**Note on marking strategy**:
+Instead of diffing between before/after installed packages, we simply:
+1. After sync completes, run `pacman -D --asdeps` on ALL currently installed packages (this marks everything as deps)
+2. Then run `pacman -D --asexplicit` on the collected state packages (this overrides them to explicit)
+
+This is simpler and achieves the same result.
+
+## Risks / Trade-offs
+
+1. **[Risk]** dyalpm initialization requires root privileges
+   - **[Mitigation]** This is same as pacman itself; if user can't run pacman, declpac won't work
+
+2. **[Risk]** libalpm state becomes stale if another pacman instance runs concurrently
+   - **[Mitigation]** Use proper locking, rely on pacman's own locking mechanism
+
+3. **[Risk]** AUR packages still built sequentially
+   - **[Acceptable]** Parallel AUR builds out of scope for this change
+
+4. **[Risk]** Memory usage for large package lists
+   - **[Mitigation]** Package map is ~100 bytes per package; 10k packages = ~1MB
+
+## Migration Plan
+
+1. Add `github.com/Jguer/dyalpm` to go.mod
+2. Refactor `ValidatePackage()` to use dyalpm instead of subprocesses
+3. Add `Installed bool` to `PackageInfo` struct
+4. Implement new resolution algorithm in `categorizePackages()`
+5. Update `Sync()` and `DryRun()` to use new algorithm
+6. Test with various package combinations
+7. Verify output matches previous behavior
+
+## Open Questions
+
+- **Q**: Should we also use dyalpm for `GetInstalledPackages()`?
+- **A**: Yes, can use localDB.PkgCache().Collect() or iterate - aligns with overall approach

openspec/changes/archive/2026-04-17-batch-pacman-checks/proposal.md

@@ -0,0 +1,35 @@
+## Why
+
+The current pacman implementation spawns multiple subprocesses per package (pacman -Qip, pacman -Sip) to check if packages exist in local/sync DBs or AUR. With many packages, this creates significant overhead. Using the Jguer/dyalpm library provides direct libalpm access for batch queries, eliminating subprocess overhead while maintaining the batched AUR HTTP calls.
+
+## What Changes
+
+- **Add dyalpm dependency**: Integrate Jguer/dyalpm library for direct libalpm access
+- **Batch local DB check**: Use `localDB.PkgCache()` to check all packages at once instead of per-package `pacman -Qip`
+- **Batch sync DB check**: Use `syncDBs[i].PkgCache()` to check all sync repos at once instead of per-package `pacman -Sip`
+- **Enhance PackageInfo**: Add `Installed bool` field to track if package is already installed
+- **New algorithm**: Implement unified package resolution flow:
+  1. Batch check local DB for all packages
+  2. Batch check sync DBs for remaining packages
+  3. Batch query AUR for non-found packages
+  4. Track installed status throughout
+  5. Perform sync operations with proper marking
+  6. Output summary of changes
+
+## Capabilities
+
+### New Capabilities
+
+- `batch-package-resolution`: Unified algorithm that batch-resolves packages from local DB → sync DBs → AUR with proper installed tracking
+- `dry-run-simulation`: Shows exact packages that would be installed/removed without making changes
+
+### Modified Capabilities
+
+- None - this is a pure optimization with no behavior changes visible to users
+
+## Impact
+
+- **Code**: `pkg/pacman/pacman.go` - refactored to use dyalpm
+- **Dependencies**: Add Jguer/dyalpm to go.mod
+- **APIs**: `ValidatePackage()` signature changes (returns installed status)
+- **Performance**: O(n) subprocess calls → O(1) for local/sync DB checks

openspec/changes/archive/2026-04-17-batch-pacman-checks/specs/batch-package-resolution/spec.md

@@ -0,0 +1,72 @@
+## ADDED Requirements
+
+### Requirement: Batch package resolution from local, sync, and AUR databases
+The system SHALL resolve packages in a single pass through local DB → sync DBs → AUR using batch operations to minimize subprocess/API calls.
+
+#### Scenario: Package exists in local DB
+- **WHEN** a package from collected state exists in the local database
+- **THEN** the system SHALL mark it as found, set `Installed=true`, and exclude it from AUR queries
+
+#### Scenario: Package exists in sync DB
+- **WHEN** a package from collected state does NOT exist in local DB but exists in ANY enabled sync database
+- **THEN** the system SHALL mark it as found, set `Installed=false`, and exclude it from AUR queries
+
+#### Scenario: Package exists only in AUR
+- **WHEN** a package from collected state does NOT exist in local or sync databases but exists in AUR
+- **THEN** the system SHALL mark it as found with `InAUR=true`, set `Installed=false`, and use the cached AUR info
+
+#### Scenario: Package not found anywhere
+- **WHEN** a package from collected state is NOT in local DB, NOT in any sync DB, and NOT in AUR
+- **THEN** the system SHALL return an error listing the unfound package(s)
+
+#### Scenario: Batch AUR query
+- **WHEN** multiple packages need AUR lookup
+- **THEN** the system SHALL make a SINGLE HTTP request to AUR RPC with all package names (existing behavior preserved)
+
+### Requirement: Efficient local DB lookup using dyalpm
+The system SHALL use dyalpm's `PkgCache()` iterator to build a lookup map in O(n) time, where n is total packages in local DB, instead of O(n*m) subprocess calls.
+
+#### Scenario: Build local package map
+- **WHEN** initializing package resolution
+- **THEN** the system SHALL iterate localDB.PkgCache() once and store all package names in a map for O(1) lookups
+
+#### Scenario: Check package in local map
+- **WHEN** checking if a package exists in local DB
+- **THEN** the system SHALL perform an O(1) map lookup instead of spawning a subprocess
+
+### Requirement: Efficient sync DB lookup using dyalpm
+The system SHALL use each sync DB's `PkgCache()` iterator to check packages across all enabled repositories.
+
+#### Scenario: Check package in sync DBs
+- **WHEN** a package is not found in local DB
+- **THEN** the system SHALL check all enabled sync databases using their iterators
+
+#### Scenario: Package found in multiple sync repos
+- **WHEN** a package exists in more than one sync repository (e.g., core and community)
+- **THEN** the system SHALL use the first match found
+
+### Requirement: Track installed status in PackageInfo
+The system SHALL include an `Installed bool` field in `PackageInfo` to indicate whether the package is currently installed.
+
+#### Scenario: Package is installed
+- **WHEN** a package exists in the local database
+- **THEN** `PackageInfo.Installed` SHALL be `true`
+
+#### Scenario: Package is not installed
+- **WHEN** a package exists only in sync DB or AUR (not in local DB)
+- **THEN** `PackageInfo.Installed` SHALL be `false`
+
+### Requirement: Mark installed packages as deps, then state packages as explicit
+After package sync completes, the system SHALL mark all installed packages as dependencies, then override the collected state packages to be explicit. This avoids diffing before/after states.
+
+#### Scenario: Mark all installed as deps
+- **WHEN** package sync has completed (non-dry-run)
+- **THEN** the system SHALL run `pacman -D --asdeps` to mark ALL currently installed packages as dependencies
+
+#### Scenario: Override state packages to explicit
+- **WHEN** all installed packages have been marked as deps
+- **THEN** the system SHALL run `pacman -D --asexplicit` on the collected state packages, overriding their dependency status
+
+#### Scenario: Dry-run skips marking
+- **WHEN** operating in dry-run mode
+- **THEN** the system SHALL NOT execute any `pacman -D` marking operations

openspec/changes/archive/2026-04-17-batch-pacman-checks/specs/dry-run-simulation/spec.md

@@ -0,0 +1,28 @@
+## ADDED Requirements
+
+### Requirement: Dry-run shows packages to install without making changes
+In dry-run mode, the system SHALL compute what WOULD happen without executing any pacman operations.
+
+#### Scenario: Dry-run lists packages to install
+- **WHEN** dry-run is enabled and packages need to be installed
+- **THEN** the system SHALL populate `Result.ToInstall` with all packages that would be installed (both sync and AUR)
+
+#### Scenario: Dry-run lists packages to remove
+- **WHEN** dry-run is enabled and orphan packages exist
+- **THEN** the system SHALL populate `Result.ToRemove` with the list of orphan packages and `Result.Removed` with the count
+
+#### Scenario: Dry-run skips pacman sync
+- **WHEN** dry-run is enabled
+- **THEN** the system SHALL NOT execute `pacman -Syu` for package installation
+
+#### Scenario: Dry-run skips explicit/deps marking
+- **WHEN** dry-run is enabled
+- **THEN** the system SHALL NOT execute `pacman -D --asdeps` or `pacman -D --asexplicit`
+
+#### Scenario: Dry-run skips orphan cleanup
+- **WHEN** dry-run is enabled
+- **THEN** the system SHALL NOT execute `pacman -Rns` for orphan removal
+
+#### Scenario: Dry-run outputs count summary
+- **WHEN** dry-run is enabled
+- **THEN** the system SHALL still compute and output `Result.Installed` and `Result.Removed` counts as if the operations had run

openspec/changes/archive/2026-04-17-batch-pacman-checks/tasks.md

@@ -0,0 +1,51 @@
+## 1. Setup
+
+- [x] 1.1 Add `github.com/Jguer/dyalpm` to go.mod
+- [x] 1.2 Run `go mod tidy` to fetch dependencies
+
+## 2. Core Refactoring
+
+- [x] 2.1 Update `PackageInfo` struct to add `Installed bool` field
+- [x] 2.2 Create `Pac` struct with `alpm.Handle` instead of just aurCache
+- [x] 2.3 Implement `NewPac()` that initializes alpm handle and local/sync DBs
+
+## 3. Package Resolution Algorithm
+
+- [x] 3.1 Implement `buildLocalPkgMap()` - iterate localDB.PkgCache() to create lookup map
+- [x] 3.2 Implement `checkSyncDBs()` - iterate each sync DB's PkgCache() to find packages
+- [x] 3.3 Implement `resolvePackages()` - unified algorithm:
+  - Step 1: Check local DB for all packages (batch)
+  - Step 2: Check sync DBs for remaining packages (batch per repo)
+  - Step 3: Batch query AUR for remaining packages
+  - Step 4: Return error if any package unfound
+  - Step 5: Track installed status from local DB
+
+## 4. Sync and DryRun Integration
+
+- [x] 4.1 Refactor `Sync()` function to use new resolution algorithm
+- [x] 4.2 Refactor `DryRun()` function to use new resolution algorithm
+- [x] 4.3 Preserve AUR batched HTTP calls (existing `fetchAURInfo`)
+- [x] 4.4 Preserve orphan cleanup logic (`CleanupOrphans()`)
+
+## 5. Marking Operations
+
+- [x] 5.1 Keep `MarkExplicit()` for marking state packages
+- [x] 5.2 After sync, run `pacman -D --asdeps` on ALL installed packages (simplifies tracking)
+- [x] 5.3 After deps marking, run `pacman -D --asexplicit` on collected state packages (overrides deps)
+- [x] 5.4 Skip marking operations in dry-run mode
+
+## 6. Cleanup and Output
+
+- [x] 6.1 Remove subprocess-based `ValidatePackage()` implementation
+- [x] 6.2 Remove subprocess-based `GetInstalledPackages()` implementation
+- [x] 6.3 Update output summary to show installed/removed counts
+- [x] 6.4 In dry-run mode, populate `ToInstall` and `ToRemove` lists
+
+## 7. Testing
+
+- [ ] 7.1 Test with packages in local DB only
+- [ ] 7.2 Test with packages in sync DBs only
+- [ ] 7.3 Test with AUR packages
+- [ ] 7.4 Test with missing packages (should error)
+- [ ] 7.5 Test dry-run mode output
+- [ ] 7.6 Test orphan detection and cleanup

openspec/changes/archive/2026-04-17-declpac-cli-tool/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-13

openspec/changes/archive/2026-04-17-declpac-cli-tool/design.md

@@ -0,0 +1,146 @@
+## Context
+
+Pacman, Arch Linux's package manager, lacks declarative package management and
+doesn't support partial upgrades. Users managing system packages from scripts
+or configuration files need a way to ensure their system state matches a declared
+package list, with all packages at their latest available versions.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Provide a declarative interface for pacman package management through
+  command-line interface
+- Support flexible input sources (stdin and multiple state files) with
+  additive merging
+- **Automatically resolve transitive dependencies (users specify only direct packages)**
+- Enforce full package upgrades (no partial upgrades) to prevent version
+  mismatches
+- Generate machine-readable output suitable for automated scripting
+- Enable AI-driven implementation for new Go developers
+
+**Non-Goals:**
+- Package dependency resolution or smart upgrade scheduling
+- Transaction rollback capabilities
+- Pretty terminal output or interactive prompts
+- Support for partial upgrades or selective package versions
+- State persistence (tool only syncs, doesn't save state)
+
+## Decisions
+
+**Language: Go**
+- Rationale: User wants modern CLI tool with native package management
+  capabilities
+- Go provides strong standard library, easy command-line parsing, and
+  excellent for system-level operations
+- User unfamiliar with Go - implementation will be AI-driven with detailed
+  documentation
+
+**Input Parsing Approach**
+- Parse whitespace, tabs, newlines for package names
+- Support multiple --state files: all additive including with stdin
+- Empty state detection: print error to stderr and exit with code 1 (abort)
+
+**Package Database Freshness**
+- Use libalpm (dyalpm) to check last sync time from /var/lib/pacman/db.lock timestamp
+- If database older than 1 day, run `pacman -Syy` to refresh before validation
+- Refresh happens before validation and sync operations
+
+**Package Validation**
+- Validate all declared packages exist in pacman repos or AUR before sync
+- Use libalpm (dyalpm) for pacman repo queries (fast local DB access)
+- Use Jguer/aur library for AUR queries
+- Fail fast with clear error if any package not found
+- Let pacman report detailed errors during sync (don't duplicate validation)
+
+**State Merging Logic**
+- All inputs are additive: combine all packages from stdin and all state files
+- No conflict resolution: missing packages are added, duplicates accumulate
+- Order-independent: inputs don't override each other
+
+**Hybrid Query/Modify Approach**
+- **Query operations**: Use libalpm (dyalpm) for fast local package database access
+  - Query installed packages, available packages, package details
+  - Check database freshness (last sync time)
+- **Modify operations**: Use os/exec.Command to run pacman commands
+  - pacman -Syy: Refresh package databases
+  - pacman -Syu: Install/upgrade packages (full upgrade)
+  - pacman -D --explicit: Mark packages as explicitly installed
+  - pacman -Rns: Remove orphaned packages
+- Capture stderr/stdout for error reporting and output generation
+- Detect pacman exit codes and translate to tool exit codes
+
+**Error Handling Strategy**
+- Parse pacman error messages from stderr output
+- Distinguish between package-not-found (warning) vs. execution failures (errors)
+- Return appropriate exit codes: 0 for success, non-zero for errors
+- Include error details in output for scripting purposes
+
+**AUR Integration**
+- First attempt: Try pacman -Syu for all packages (includes AUR auto-install if enabled)
+- For packages not found in pacman repos: Batch query AUR via info endpoint (single HTTP request for multiple packages)
+- If package in AUR: Build and install with makepkg (no AUR helpers)
+- AUR packages should also upgrade to latest version (no partial updates)
+- Clone AUR git repo to temp directory
+- Run `makepkg -si` in temp directory for installation
+- Capture stdout/stderr for output parsing
+- Report error to stderr if package not found in pacman or AUR
+
+**Dependency Resolution**
+- Use pacman's dependency resolution by passing all declared packages to `pacman -Syu`
+- Pacman automatically resolves and includes transitive dependencies
+- For AUR packages, makepkg handles dependency resolution during build
+- No custom dependency resolution logic required - delegate to pacman/makepkg
+
+**Explicit Marking & Orphan Cleanup**
+- Before syncing, get list of all currently installed packages
+- Mark declared state packages as explicitly installed via `pacman -D --explicit <pkg>`
+- All other installed packages remain as non-explicit (dependencies)
+- After sync completes, run `pacman -Rns $(pacman -Qdtq)` to remove orphaned packages
+- Pacman -Rns $(pacman -Qdtq) only removes packages that are not explicitly
+  installed and not required
+- Capture and report number of packages removed during cleanup
+
+**Package Version Management**
+- Always force full system upgrade via `pacman -Syu <packages>`
+- Pacman handles version selection automatically, ensuring latest versions
+- No semantic version comparison or pinning logic required
+
+**CLI Interface**
+- Usage: `declpac --state file1.txt --state file2.txt < stdin`
+- Multiple --state flags allowed, all additive
+- Stdin input via standard input stream
+- No interactive prompts - fully automated
+- `--dry-run`: Simulate sync without making changes, print what would be installed/removed
+
+**Output Format**
+- Success: Print to stdout: `Installed X packages, removed Y packages`
+- No changes: Print `Installed 0 packages, removed 0 packages`
+- Dry-run: Print `Installed X packages, removed Y packages` with `Would install: ...` and `Would remove: ...` lines
+- Errors: Print error message to stderr
+- Exit codes: 0 for success, 1 for errors
+
+## Risks / Trade-offs
+
+**Known Risks:**
+- [User unfamiliarity with Go] → Mitigation: Provide complete implementation
+  with detailed comments; user can review and run without understanding deeply
+- [Pacman error message parsing complexity] → Mitigation: Use broad error
+  pattern matching; include error output as-is for debugging
+- [Empty state triggers abort] → Mitigation: Print error to stderr and exit
+  with code 1 instead of proceeding with empty state
+- [Additive merging could accumulate duplicates] → Mitigation: Accept as
+  design choice; pacman handles duplicates gracefully
+- [Dependency conflicts could occur] → Mitigation: Let pacman handle standard
+  conflicts; tool won't implement complex dependency resolution
+- [libalpm integration complexity] → Mitigation: Use dyalpm wrapper library;
+  validate queries work before build
+- [AUR package build failures] → Mitigation: Capture makepkg output, report errors
+  to stderr; don't retry
+
+**Trade-offs:**
+- No conflict resolution: simpler merging but may include packages the system
+  rejects
+- Additive vs replacement: safer but less predictable for users expecting
+  replacements
+- No user prompts: fully automated for scripting but could be risky without
+  warnings

openspec/changes/archive/2026-04-17-declpac-cli-tool/proposal.md

@@ -0,0 +1,40 @@
+## Why
+
+Pacman doesn't support declarative package management or partial upgrades,
+making it challenging to maintain consistent system states. This tool provides
+a clean, scriptable interface to synchronize the system with a declared package
+list, ensuring all packages are at the latest version.
+
+## What Changes
+
+- Add CLI tool for declarative pacman package management
+- Support stdin input for package lists
+- Support multiple --state file inputs
+- Merge all inputs (additive strategy with empty state warning)
+- Force full upgrade of all packages (no partial upgrades)
+- Handle transitive dependencies automatically (users only specify direct packages)
+- Mark non-state packages as non-explicit before sync
+- After sync, remove orphaned packages (cleanup)
+- Support AUR packages: try pacman first, then makepkg, then report errors
+- Machine-readable output (install/remove counts, exit codes)
+- No conflict resolution for missing packages (append-only)
+- Print error to stderr for empty state input and exit with code 1
+- Dry-run mode: simulate sync without making changes, show what would be installed/removed
+
+## Capabilities
+
+### New Capabilities
+
+- **stdin-input**: Read package lists from standard input stream
+- **state-files**: Load declarative package states from files
+- **input-merging**: Combine multiple input sources (stdin + multiple --state files)
+- **state-validation**: Validate package names and empty states
+- **transitive-deps**: Automatically resolve all transitive dependencies
+- **pacman-sync**: Execute pacman operations to match declared state
+- **aur-sync**: Handle AUR packages: pacman first, then fall back to makepkg,
+                  then report errors
+- **machine-output**: Generate machine-readable sync results for scripting
+
+### Modified Capabilities
+
+None (new tool)

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/aur-sync/spec.md

@@ -0,0 +1,30 @@
+## ADDED Requirements
+
+### Requirement: Handle AUR packages with fallback and upgrade
+
+The system SHALL first attempt to install packages via pacman, then fall back
+to AUR for packages not found in repos, and upgrade AUR packages to
+latest versions.
+
+#### Scenario: Try pacman first
+- **WHEN** package is in pacman repositories
+- **THEN** install via pacman -Syu
+
+#### Scenario: Fall back to AUR
+- **WHEN** package is not in pacman repositories but is in AUR
+- **THEN** batch query AUR via info endpoint (multiple packages in single request)
+- **AND** build and install with makepkg -si
+
+#### Scenario: Upgrade AUR packages
+- **WHEN** AUR package is already installed but outdated
+- **THEN** rebuild and reinstall with makepkg to get latest version
+
+#### Scenario: Report error for missing packages
+- **WHEN** package is not in pacman repositories or AUR
+- **THEN** print error to stderr with package name
+- **AND** exit with code 1
+
+#### Scenario: AUR build failure
+- **WHEN** makepkg fails to build package
+- **THEN** print makepkg error to stderr
+- **AND** exit with code 1

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/dry-run/spec.md

@@ -0,0 +1,49 @@
+# Dry-Run Mode
+
+## Summary
+
+Add `--dry-run` flag to simulate the sync operation without making any changes
+to the system. Shows what packages would be installed and what would be removed.
+
+## Motivation
+
+Users want to preview the effects of a sync operation before committing changes.
+This is useful for:
+- Verifying the intended changes are correct
+- Avoiding unintended package installations
+- Understanding what orphan cleanup will remove
+
+## Interface
+
+```
+declpac --dry-run --state packages.txt
+```
+
+## Behavior
+
+1. Read state files and stdin (same as normal mode)
+2. Validate packages exist (same as normal mode)
+3. Query current installed packages via `pacman -Qq`
+4. Compare declared packages to current state
+5. Identify packages that would be installed (not currently installed)
+6. Identify orphans that would be removed via `pacman -Qdtq`
+7. Output results with "Would install:" and "Would remove:" sections
+
+## Output Format
+
+```
+Installed 3 packages, removed 2 packages
+Would install: vim, git, docker
+Would remove: python2, perl-xml-parser
+```
+
+## Non-Goals
+
+- Actual package operations (no pacman -Syu, no pacman -Rns execution)
+- Package version comparison
+- Detailed dependency analysis
+
+## Trade-offs
+
+- Doesn't predict transitive dependencies that pacman might install
+- Orphan list may change after packages are installed

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/input-merging/spec.md

@@ -0,0 +1,23 @@
+## ADDED Requirements
+
+### Requirement: Can merge multiple input sources
+
+The system SHALL combine package lists from all inputs using an additive
+strategy without conflict resolution.
+
+#### Scenario: Additive merging of all inputs
+- **WHEN** stdin and multiple state files provide package lists
+- **THEN** system shall include all packages from all inputs in the final state
+
+#### Scenario: Input priority is last-writer-wins per file
+- **WHEN** multiple state files contain the same package name
+- **THEN** the package from the last provided file in command-line order takes
+  precedence
+
+#### Scenario: Missing packages from stdin are added
+- **WHEN** stdin contains packages not in state files
+- **THEN** those packages shall be added to the final state
+
+#### Scenario: Duplicate packages are deduplicated
+- **WHEN** the same package appears in multiple inputs
+- **THEN** it shall be included once in the final state (map deduplication)

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/machine-output/spec.md

@@ -0,0 +1,30 @@
+## ADDED Requirements
+
+### Requirement: Generate consistent output format
+
+The system SHALL produce console output suitable for logging and scripting.
+
+#### Scenario: Successful sync with changes
+- **WHEN** sync completes with packages installed or removed
+- **THEN** print to stdout: `Installed X packages, removed Y packages`
+- **AND** exit with code 0
+
+#### Scenario: No changes needed
+- **WHEN** all packages already match declared state
+- **THEN** print to stdout: `Installed 0 packages, removed 0 packages`
+- **AND** exit with code 0
+
+#### Scenario: Error during sync
+- **WHEN** pacman or makepkg operation fails
+- **THEN** print error to stderr with details
+- **AND** exit with code 1
+
+#### Scenario: Validation failure
+- **WHEN** package validation fails (package not in pacman or AUR)
+- **THEN** print error to stderr with package name
+- **AND** exit with code 1
+
+#### Scenario: Empty state input
+- **WHEN** no packages provided from stdin or state files
+- **THEN** print error to stderr: `empty state input`
+- **AND** exit with code 1

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/orphan-cleanup/spec.md

@@ -0,0 +1,29 @@
+## ADDED Requirements
+
+### Requirement: Can mark non-state packages as non-explicit
+
+The system SHALL mark all packages not declared in the state as non-explicit
+(dependencies) before syncing, so they can be safely removed later.
+
+#### Scenario: Mark packages as non-explicit
+- **WHEN** packages are declared in state
+- **THEN** system shall mark those packages as explicitly installed via pacman -D --explicit
+- **AND** mark all other installed packages as non-explicit
+
+### Requirement: Can clean up orphaned packages
+
+After syncing, the system SHALL remove packages that are no longer required
+(as dependencies of removed packages).
+
+#### Scenario: Orphan cleanup after sync
+- **WHEN** sync operation completes successfully
+- **THEN** system shall run pacman -Rns to remove unneeded dependencies
+- **AND** report the number of packages removed
+
+#### Scenario: Orphan cleanup respects explicitly installed
+- **WHEN** a package not in state is marked as explicitly installed by user
+- **THEN** system shall NOT remove it during orphan cleanup
+
+#### Scenario: No orphans to clean
+- **WHEN** there are no orphaned packages to remove
+- **THEN** system shall report "No packages to remove" in output

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/pacman-query/spec.md

@@ -0,0 +1,22 @@
+## ADDED Requirements
+
+### Requirement: Query pacman package database via libalpm
+
+The system SHALL use libalpm for fast local queries against the pacman
+package database.
+
+#### Scenario: Query installed packages
+- **WHEN** needing list of currently installed packages
+- **THEN** query via libalpm alpm_list_get(ALPM_LIST_PACKAGES)
+
+#### Scenario: Query available packages
+- **WHEN** validating package exists in pacman repos
+- **THEN** query via libalpm alpm_db_get_pkg()
+
+#### Scenario: Check database last sync time
+- **WHEN** checking if database needs refresh
+- **THEN** check /var/lib/pacman/db.lock timestamp
+
+#### Scenario: Query foreign packages
+- **WHEN** checking if package is AUR-installed
+- **THEN** query via libalpm alpm_db_get_pkg(ALPM_DB_TYPE_LOCAL)

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/pacman-sync/spec.md

@@ -0,0 +1,25 @@
+## ADDED Requirements
+
+### Requirement: Can sync system with declared package state
+
+The system SHALL execute pacman operations to install and upgrade all declared packages.
+
+#### Scenario: Full system upgrade with all packages
+- **WHEN** system has declared package list
+- **THEN** system shall run pacman -Syu with all declared package names
+
+#### Scenario: No partial upgrades
+- **WHEN** running pacman commands
+- **THEN** system shall use -S --needed flag (sync with skip if up-to-date) ensuring declared packages are present
+
+#### Scenario: Package availability check
+- **WHEN** a package from input is not in pacman repositories
+- **THEN** system shall report the error and include package name
+
+#### Scenario: Pacman execution capture
+- **WHEN** pacman commands execute
+- **THEN** system shall capture both stdout and stderr for error reporting
+
+#### Scenario: Exit code propagation
+- **WHEN** pacman commands execute
+- **THEN** system shall exit with code equal to pacman's exit code for success/failure detection

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/state-files/spec.md

@@ -0,0 +1,21 @@
+## ADDED Requirements
+
+### Requirement: Can load package states from state files
+
+The system SHALL load package lists from state files specified via --state flag.
+
+#### Scenario: Single state file loading
+- **WHEN** a state file is provided via --state flag
+- **THEN** system shall read package names from the file content
+
+#### Scenario: Multiple state file loading
+- **WHEN** multiple --state flags are provided
+- **THEN** system shall load package names from each file
+
+#### Scenario: State file format is text list
+- **WHEN** loading from state files
+- **THEN** system shall parse whitespace-delimited package names
+
+#### Scenario: File path validation
+- **WHEN** a state file path points to a non-existent file
+- **THEN** system shall report a file read error

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/state-validation/spec.md

@@ -0,0 +1,28 @@
+## ADDED Requirements
+
+### Requirement: Validate package names exist in pacman or AUR
+
+The system SHALL validate that all declared packages exist in pacman
+repositories or AUR before attempting to sync.
+
+#### Scenario: Empty state detection
+- **WHEN** no package names are found in stdin or state files
+- **THEN** print error to stderr: `empty state input`
+- **AND** exit with code 1
+
+#### Scenario: Validate package in pacman repos
+- **WHEN** package exists in pacman repositories
+- **THEN** validation passes
+
+#### Scenario: Validate package in AUR
+- **WHEN** package not in pacman repos but exists in AUR
+- **THEN** validation passes
+
+#### Scenario: Package not found
+- **WHEN** package not in pacman repos or AUR
+- **THEN** print error to stderr with package name
+- **AND** exit with code 1
+
+#### Scenario: Database freshness check
+- **WHEN** pacman database last sync was more than 1 day ago
+- **THEN** run pacman -Syy to refresh before validation

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/stdin-input/spec.md

@@ -0,0 +1,17 @@
+## ADDED Requirements
+
+### Requirement: Can read package lists from stdin
+
+The system SHALL accept package names from standard input, where each line represents a package name.
+
+#### Scenario: Packages from stdin are read correctly
+- **WHEN** package names are passed via stdin separated by whitespace, tabs, or newlines
+- **THEN** system shall parse each unique package name from the input stream
+
+#### Scenario: Empty stdin input is handled
+- **WHEN** stdin contains no package names
+- **THEN** system shall skip stdin input processing
+
+#### Scenario: Whitespace normalization
+- **WHEN** packages are separated by multiple spaces, tabs, or newlines
+- **THEN** each package name shall have leading/trailing whitespace trimmed

openspec/changes/archive/2026-04-17-declpac-cli-tool/specs/transitive-deps/spec.md

@@ -0,0 +1,23 @@
+## ADDED Requirements
+
+### Requirement: Can resolve transitive dependencies automatically
+
+The system SHALL automatically determine and install all transitive dependencies
+for declared packages, so users only need to specify direct packages.
+
+#### Scenario: Transitive dependencies are resolved
+- **WHEN** a package with dependencies is declared in state
+- **THEN** system shall identify all transitive dependencies via pacman
+- **AND** include them in the installation operation
+
+#### Scenario: Dependency resolution includes AUR dependencies
+- **WHEN** a package's transitive dependencies include AUR packages
+- **THEN** system shall resolve those AUR dependencies via makepkg
+
+#### Scenario: Shared dependencies are deduplicated
+- **WHEN** multiple declared packages share dependencies
+- **THEN** system shall install each shared dependency only once
+
+#### Scenario: Missing dependency handling
+- **WHEN** a declared package has a dependency not available in pacman or AUR
+- **THEN** system shall report error for the missing dependency

openspec/changes/archive/2026-04-17-declpac-cli-tool/tasks.md

@@ -0,0 +1,104 @@
+## 1. Project Setup
+
+- [x] 1.1 Initialize Go module with proper imports
+- [x] 1.2 Add required dependencies (dyalpm wrapper, Jguer/aur)
+- [x] 1.3 Set up project structure (cmd/declpac/main.go, pkg/ subdirectory)
+- [x] 1.4 Add libalpm initialization and handle
+
+## 2. Input Parsing
+
+- [x] 2.1 Implement stdin reader to collect package names
+- [x] 2.2 Implement state file reader for text-list format
+- [x] 2.3 Add whitespace normalization for package names
+- [x] 2.4 Create package name set data structure
+
+## 3. Input Merging
+
+- [x] 3.1 Implement additive merging of stdin and state file packages
+- [x] 3.2 Handle multiple --state flags with last-writer-wins per file
+- [x] 3.3 Implement duplicate package handling (no deduplication)
+
+## 4. State Validation
+
+- [x] 4.1 Implement empty state detection (no packages found)
+- [x] 4.2 Add stderr error output for empty state
+- [x] 4.3 Set exit code 1 for empty state case (abort, not proceed)
+- [x] 4.4 Check pacman DB freshness (db.lock timestamp)
+- [x] 4.5 Run pacman -Syy if DB older than 1 day
+- [x] 4.6 Validate packages via libalpm (pacman repos)
+- [x] 4.7 Validate packages via Jguer/aur (AUR)
+- [x] 4.8 Fail fast with error if package not found
+
+## 5. Pacman Integration (Hybrid: query via libalpm, modify via exec)
+
+- [x] 5.1 Initialize libalpm handle for queries
+- [x] 5.2 Implement libalpm query for installed packages
+- [x] 5.3 Implement libalpm query for available packages
+- [x] 5.4 Implement pacman -Syy command execution (DB refresh)
+- [x] 5.5 Implement pacman -Syu command execution wrapper
+- [x] 5.6 Add command-line argument construction with package list
+- [x] 5.7 Capture pacman stdout and stderr output
+- [x] 5.8 Implement pacman error message parsing
+- [x] 5.9 Handle pacman exit codes for success/failure detection
+- [x] 5.10 Verify pacman automatically resolves transitive dependencies
+
+## 6. Explicit Marking & Orphan Cleanup
+
+- [x] 6.1 Get list of currently installed packages before sync
+- [x] 6.2 Mark declared state packages as explicitly installed via pacman -D --explicit
+- [x] 6.3 Run pacman sync operation (5.x series)
+- [x] 6.4 Run pacman -Rns to remove orphaned packages
+- [x] 6.5 Capture and report number of packages removed
+- [x] 6.6 Handle case where no orphans exist (no packages removed)
+
+## 7. AUR Integration
+
+- [x] 7.1 Implement AUR package lookup via Jguer/aur library
+- [x] 7.2 Check package not in pacman repos first (via libalpm)
+- [x] 7.3 Query AUR for missing packages
+- [x] 7.4 Implement AUR fallback using makepkg (direct build, not AUR helper)
+- [x] 7.5 Clone AUR package git repo to temp directory
+- [x] 7.6 Run makepkg -si in temp directory for installation
+- [x] 7.7 Upgrade existing AUR packages to latest (makepkg rebuild)
+- [x] 7.8 Add stderr error reporting for packages not in pacman or AUR
+- [x] 7.9 Capture makepkg stdout and stderr for output parsing
+- [x] 7.10 Handle makepkg exit codes for success/failure detection
+
+## 8. Output Generation
+
+- [x] 8.1 Parse pacman output for installed package count
+- [x] 8.2 Parse pacman output for removed package count (orphan cleanup)
+- [x] 8.3 Generate output: `Installed X packages, removed Y packages`
+- [x] 8.4 Handle 0 packages case: `Installed 0 packages, removed 0 packages`
+- [x] 8.5 Print errors to stderr
+- [x] 8.6 Set exit code 0 for success, 1 for errors
+
+## 9. CLI Interface
+
+- [x] 9.1 Implement --state flag argument parsing
+- [x] 9.2 Implement stdin input handling from /dev/stdin
+- [x] 9.3 Set up correct CLI usage/help message
+- [x] 9.4 Implement flag order validation
+
+## 10. Integration & Testing
+
+- [x] 10.1 Wire together stdin -> state files -> merging -> validation -> pacman sync -> orphan cleanup -> output
+- [x] 10.2 Test empty state error output and exit code 1
+- [x] 10.3 Test single state file parsing
+- [x] 10.4 Test multiple state file merging
+- [x] 10.5 Test stdin input parsing
+- [x] 10.6 Test explicit marking before sync
+- [x] 10.7 Test pacman command execution with real packages
+- [x] 10.8 Test orphan cleanup removes unneeded packages
+- [x] 10.9 Test AUR fallback with makepkg for AUR package
+- [x] 10.10 Test error handling for missing packages
+- [x] 10.11 Generate final binary
+
+## 11. Dry-Run Mode
+
+- [x] 11.1 Add --dry-run flag to CLI argument parsing
+- [x] 11.2 Implement DryRun function to query current state
+- [x] 11.3 Compare declared packages to current installations
+- [x] 11.4 Identify packages to install (not currently installed)
+- [x] 11.5 Identify orphans to remove via pacman -Qdtq
+- [x] 11.6 Output "Would install:" and "Would remove:" sections

openspec/changes/archive/2026-04-17-fix-package-fetch-logic/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-17

openspec/changes/archive/2026-04-17-fix-package-fetch-logic/design.md

@@ -0,0 +1,44 @@
+## Context
+
+Current `Resolve` in `pkg/fetch/fetch.go`:
+1. Initialize all packages with `Exists: true`
+2. Check local DB, set `Installed: true` if found
+3. Check sync DBs, set `Installed: false`
+4. Check AUR, set `InAUR: true`
+5. Error if not found anywhere
+
+Bug: wrong default + wrong order + conflates two concerns.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Fix Resolve algorithm to correctly classify packages
+- Separate "available" from "installed" concerns
+
+**Non-Goals:**
+- No new APIs or features
+- No refactoring outside Resolve function
+
+## Decisions
+
+**Decision 1: Start with Exists: false**
+- Default `Exists: false` (unknown) instead of `true`
+- Only set true when confirmed in sync DBs
+
+**Decision 2: Check sync DBs first**
+- Order: sync → local → AUR
+- First determine if package exists (anywhere)
+- Then determine if installed (local only)
+
+**Decision 3: Two-phase classification**
+
+| Phase | Check | Sets |
+|------|-------|-----|
+| 1. Availability | sync DBs | Exists: true/false |
+| 2. Installation | local DB | Installed: true/false |
+| 3. Fallback | AUR | InAUR: true if not in sync |
+
+## Risks / Trade-offs
+
+- Minimal risk: localized fix only
+- Trade-off: slight performance cost (check sync before local) - acceptable for correctness

openspec/changes/archive/2026-04-17-fix-package-fetch-logic/proposal.md

@@ -0,0 +1,26 @@
+## Why
+
+The `Resolve` function in `pkg/fetch/fetch.go` has incorrect logic flow. It
+initializes all packages with `Exists: true`, then checks local DB first, then
+sync DBs, then AUR. This wrong order causes incorrect package state
+classification - packages that exist only in AUR may be incorrectly marked as
+found.
+
+## What Changes
+
+- Fix initialization: packages should start with `Exists: false` (unknown), not `true`
+- Fix order: check sync DBs BEFORE local DB to determine availability
+- Separate independent concerns: "available" (sync/AUR) from "installed" (local)
+- All packages must validate: either `Exists: true` or `InAUR: true`
+
+## Capabilities
+
+### New Capabilities
+- `package-resolve-logic`: Correct resolution algorithm for pacman packages
+
+### Modified Capabilities
+- None
+
+## Impact
+
+- `pkg/fetch/fetch.go`: `Resolve` function

openspec/changes/archive/2026-04-17-fix-package-fetch-logic/tasks.md

@@ -0,0 +1,7 @@
+## 1. Fix Resolve Function Logic
+
+- [x] 1.1 Change initialization: start packages with Exists: false instead of true
+- [x] 1.2 Reorder to check sync DBs BEFORE local DB
+- [x] 1.3 Separate availability check (sync DBs) from installation check (local DB)
+- [x] 1.4 Add AUR fallback for packages not in sync DBs
+- [x] 1.5 Validate all packages have either Exists or InAUR before returning

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-14

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/design.md

@@ -0,0 +1,25 @@
+## Context
+
+The dyalpm library's `SyncDBs()` returns an empty slice because it doesn't automatically load sync databases from pacman.conf. This causes `resolvePackages()` to skip the sync DB search entirely and fall through to checking the AUR, which fails for official repo packages.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Register sync databases so `resolvePackages()` can find official repo packages
+
+**Non-Goals:**
+- Modify package installation logic
+- Add support for custom repositories
+
+## Decisions
+
+1. **Register each repo manually** - After `handle.SyncDBs()` returns empty, loop through known repos (core, extra, multilib) and call `handle.RegisterSyncDB()` for each.
+
+2. **Use hardcoded repo list** - Arch Linux standard repos are core, extra, multilib. This matches pacman.conf.
+
+3. **Silent failure for missing repos** - If a repo isn't configured in pacman.conf, `RegisterSyncDB` will return a valid but empty DB. Filter by checking if `PkgCache()` has any packages.
+
+## Risks / Trade-offs
+
+- Hardcoded repo names may need updating if Arch adds/removes standard repos → Low risk, rare change
+- Repo registration could fail silently → Mitigated by checking PkgCache count

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/proposal.md

@@ -0,0 +1,21 @@
+## Why
+
+The program fails to find packages that exist in official repositories (like `cmake` in `extra`). The dyalpm library's `SyncDBs()` returns an empty list, so the code never searches the sync databases and falls through to checking the AUR, which also doesn't have the package.
+
+## What Changes
+
+- Register sync databases manually after initializing the dyalpm handle
+- Loop through known repos (core, extra, multilib) and call `RegisterSyncDB` for each
+- Handle the case where a repo might not be configured in pacman.conf
+
+## Capabilities
+
+### New Capabilities
+- None - this is a bug fix to existing functionality
+
+### Modified Capabilities
+- None
+
+## Impact
+
+- `pkg/fetch/fetch.go`: Modify `New()` function to register sync DBs after getting them from the handle

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/specs/package-resolution/spec.md

@@ -0,0 +1,7 @@
+## ADDED Requirements
+
+No new requirements - this is a bug fix to existing package resolution functionality.
+
+## MODIFIED Requirements
+
+No modified requirements.

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/tasks.md

@@ -0,0 +1,10 @@
+## 1. Implement sync DB registration
+
+- [x] 1.1 Modify Pac struct to include a method for registering sync DBs
+- [x] 1.2 In New(), after getting empty syncDBs from handle, loop through ["core", "extra", "multilib"] and call RegisterSyncDB for each
+- [x] 1.3 Filter out repos that have no packages (not configured in pacman.conf)
+
+## 2. Test the fix
+
+- [x] 2.1 Run `./declpac --dry-run --state <(echo "cmake")` and verify it resolves cmake from extra repo
+- [x] 2.2 Test with other official repo packages (e.g., "git" from extra, "base" from core)

openspec/changes/archive/2026-04-17-refactor-modularize-pkg/.openspec.yaml

@@ -0,0 +1,2 @@
+schema: spec-driven
+created: 2026-04-14

openspec/changes/archive/2026-04-17-refactor-modularize-pkg/design.md

@@ -0,0 +1,141 @@
+# Design: Refactor pkg Into Modular Packages
+
+## New Structure
+
+```
+pkg/
+├── pacman/     # write operations only
+│   └── pacman.go
+├── fetch/     # package resolution (NEW)
+│   └── fetch.go
+├── validation/ # DB freshness (existing, expand)
+│   └── validation.go
+├── output/    # (unchanged)
+│   └── output.go
+├── merge/    # (unchanged)
+│   └── merge.go
+└── input/    # (unchanged)
+    └── input.go
+```
+
+## Package Responsibilities
+
+### pkg/fetch (NEW)
+
+```
+type Fetcher struct {
+    handle  dyalpm.Handle
+    localDB dyalpm.Database
+    syncDBs []dyalpm.Database
+    aurCache map[string]AURPackage
+}
+
+func New() *Fetcher
+func (f *Fetcher) Close() error
+func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error)
+func (f *Fetcher) ListOrphans() ([]string, error)
+```
+
+Extracted from `pacman.go`:
+- `buildLocalPkgMap()`
+- `checkSyncDBs()`
+- `resolvePackages()`
+- AUR cache (`ensureAURCache()`, `fetchAURInfo()`)
+
+### pkg/pacman (REFACTORED)
+
+```
+func Sync(packages []string) (*output.Result, error)
+func DryRun(packages []string) (*output.Result, error)
+func MarkAsExplicit(packages []string) error
+func MarkAllAsDeps() error
+func CleanupOrphans() (int, error)
+```
+
+Write actions only:
+- `Sync()` - calls `Fetcher` for resolution, then pacman commands
+- `DryRun()` - calls `Fetcher.Resolve()` + `ListOrphans()`
+- `MarkAsExplicit()`, `MarkAllAsDeps()`
+- `CleanupOrphans()` - calls `ListOrphans()` then removes
+
+### pkg/validation (REFACTORED)
+
+```
+func CheckDBFreshness() error
+```
+
+Keep as-is: checks lock file age, auto-synces if stale.
+
+Remove from `pacman.go`:
+- `IsDBFresh()` - replaced by `CheckDBFreshness()`
+- `SyncDB()` - called by validation when stale
+
+### Orphan Deduplication
+
+```go
+// In fetch/fetch.go
+func (f *Fetcher) ListOrphans() ([]string, error) {
+    cmd := exec.Command("pacman", "-Qdtq")
+    // ...
+}
+
+// In pacman/pacman.go
+func CleanupOrphans() (int, error) {
+    orphans, err := fetcher.ListOrphans()  // reuse
+    if err != nil || len(orphans) == 0 {
+        return 0, nil
+    }
+    // ... remove
+}
+
+func DryRun(...) (*output.Result, error) {
+    orphans, err := fetcher.ListOrphans()  // reuse
+    // ...
+}
+```
+
+## Data Structures Move to fetch
+
+```go
+// In fetch/fetch.go
+type PackageInfo struct {
+    Name      string
+    InAUR     bool
+    Exists    bool
+    Installed bool
+    AURInfo   *AURPackage
+    syncPkg   dyalpm.Package
+}
+
+type AURResponse struct {
+    Results []AURPackage `json:"results"`
+}
+
+type AURPackage struct {
+    Name        string `json:"Name"`
+    PackageBase string `json:"PackageBase"`
+    Version     string `json:"Version"`
+    URL         string `json:"URL"`
+}
+```
+
+## Import Changes
+
+`pkg/pacman/fetch.go` will need:
+- `github.com/Jguer/dyalpm`
+- `github.com/Riyyi/declpac/pkg/output`
+
+`pkg/pacman/pacman.go` will need:
+- `github.com/Riyyi/declpac/pkg/fetch`
+- `github.com/Riyyi/declpac/pkg/output`
+
+## Dependencies to Add
+
+- New import: `pkg/fetch` in `pacman` package
+
+## No Changes To
+
+- CLI entry points
+- `output.Result` struct
+- `input.ReadPackages()`
+- `merge.Merge()`

openspec/changes/archive/2026-04-17-refactor-modularize-pkg/proposal.md

@@ -0,0 +1,30 @@
+# Proposal: Refactor pkg Into Modular Packages
+
+## Summary
+
+Split monolithic `pkg/pacman/pacman.go` into focused packages: `fetch` (package resolution), `validation` (DB checks), and keep `pacman` for write actions only. Also deduplicate orphan detection logic.
+
+## Motivation
+
+`pacman.go` is 645 lines doing too much:
+- Package resolution (local + sync DBs + AUR)
+- DB freshness checks
+- Pacman write operations (sync, mark, clean)
+- Orphan listing/cleanup
+
+This violates single responsibility. Hard to test, reason about, or reuse. Also has duplication:
+- `validation.CheckDBFreshness()` and `pacman.IsDBFresh()` both check DB freshness
+- `listOrphans()` and `CleanupOrphans()` duplicate orphan detection
+
+## Scope
+
+- Extract package resolution to new `pkg/fetch/`
+- Move DB freshness to `pkg/validation/` (keep `CheckDBFreshness()`)
+- Keep only write actions in `pkg/pacman/`
+- Deduplicate orphan logic: one function for listing, reuse in cleanup and dry-run
+
+## Out of Scope
+
+- No new features
+- No API changes to CLI
+- No changes to `pkg/output/`, `pkg/merge/`, `pkg/input/`

openspec/changes/archive/2026-04-17-refactor-modularize-pkg/specs/scope/scope.md

@@ -0,0 +1,15 @@
+# Scope
+
+## In Scope
+
+- Extract package resolution from pacman.go to pkg/fetch
+- Deduplicate orphan listing
+- Keep pacman write operations in pacman package
+- Maintain existing CLI API
+
+## Out of Scope
+
+- New features
+- New package management backends (e.g., libalpm alternatives)
+- Config file changes
+- State file format changes

openspec/changes/archive/2026-04-17-refactor-modularize-pkg/tasks.md

@@ -0,0 +1,38 @@
+# Tasks: Refactor pkg Into Modular Packages
+
+## Phase 1: Create pkg/fetch
+
+- [x] 1.1 Create `pkg/fetch/fetch.go`
+- [x] 1.2 Move `AURResponse`, `AURPackage`, `PackageInfo` structs to fetch
+- [x] 1.3 Move `buildLocalPkgMap()` to fetch as `Fetcher.buildLocalPkgMap()`
+- [x] 1.4 Move `checkSyncDBs()` to fetch as `Fetcher.checkSyncDBs()`
+- [x] 1.5 Move `resolvePackages()` to fetch as `Fetcher.Resolve()`
+- [x] 1.6 Move AUR cache methods (`ensureAURCache`, `fetchAURInfo`) to fetch
+- [x] 1.7 Add `New()` and `Close()` to Fetcher
+- [x] 1.8 Add `ListOrphans()` to Fetcher
+
+## Phase 2: Refactor pkg/pacman
+
+- [x] 2.1 Remove from pacman.go (now in fetch):
+  - `buildLocalPkgMap()`
+  - `checkSyncDBs()`
+  - `resolvePackages()`
+  - `ensureAURCache()`
+  - `fetchAURInfo()`
+  - `AURResponse`, `AURPackage`, `PackageInfo` structs
+- [x] 2.2 Remove `IsDBFresh()` and `SyncDB()` (use validation instead)
+- [x] 2.3 Update imports in pacman.go to include fetch package
+- [x] 2.4 Update `Sync()` to use `fetch.Fetcher` for resolution
+- [x] 2.5 Update `DryRun()` to call `fetcher.ListOrphans()` instead of duplicate call
+- [x] 2.6 Update `CleanupOrphans()` to call `fetcher.ListOrphans()` instead of duplicate call
+
+## Phase 3: Clean Up Validation
+
+- [x] 3.1 Keep `validation.CheckDBFreshness()` as-is
+- [x] 3.2 Remove any remaining DB freshness duplication
+
+## Phase 4: Verify
+
+- [x] 4.1 Run tests (if any exist)
+- [x] 4.2 Build: `go build ./...`
+- [x] 4.3 Verify CLI still works: test dry-run, sync, orphan cleanup

openspec/config.yaml

@@ -1,7 +1,18 @@
+---
+
 schema: spec-driven
 
 context: |
-  Tech stack: Go
+  - Tech stack: Go
+  - Minimal external dependencies
+  - Use Jguer/dyalpm for interfacing with libalpm
+  - Use Jguer/aur for interfacing with the AUR API
+
+rules:
+  style-guide: |
+    - Favor creating and using helper library functions over local on-offs
+    - When writing non-code documents, strictly adhere to the 80 character line
+      limit
 
 # Project context (optional)
 # This is shown to AI when creating artifacts.

openspec/specs/package-resolve-logic/spec.md

@@ -0,0 +1,45 @@
+## ADDED Requirements
+
+### Requirement: Package existence check via sync DBs
+
+When resolving packages, the system SHALL first check sync databases (core, extra, multilib) to determine if a package exists in official repositories. If found in sync DBs, `Exists` SHALL be set to true.
+
+#### Scenario: Package found in sync DB
+- **WHEN** package name exists in any sync database
+- **THEN** set `Exists: true`, `InAUR: false`
+
+#### Scenario: Package not found in sync DB
+- **WHEN** package name does not exist in any sync database
+- **THEN** keep `Exists: false` for further lookup
+
+### Requirement: Package installation check via local database
+
+After checking sync DBs, the system SHALL check the local package database to determine if a package is installed. This is independent of existence check.
+
+#### Scenario: Package installed locally
+- **WHEN** package is installed on the system
+- **THEN** set `Installed: true`
+
+#### Scenario: Package not installed locally
+- **WHEN** package is not installed on the system
+- **THEN** set `Installed: false`
+
+### Requirement: AUR fallback check
+
+If package is not found in sync DBs, the system SHALL check the AUR as a fallback.
+
+#### Scenario: Package found in AUR
+- **WHEN** package exists in AUR but not in sync DBs
+- **THEN** set `InAUR: true`
+
+#### Scenario: Package not found anywhere
+- **WHEN** package not in sync DBs, not in local DB, not in AUR
+- **THEN** return error "package not found"
+
+### Requirement: Validation at resolution end
+
+After all checks complete, the system SHALL ensure every package has either `Exists: true` or `InAUR: true`. No package SHALL leave the resolver in an ambiguous state.
+
+#### Scenario: All packages valid
+- **WHEN** all packages resolved successfully
+- **THEN** every package has Exists=true OR InAUR=true

pkg/auth/auth.go

@@ -0,0 +1,104 @@
+package auth
+
+import (
+	"fmt"
+	"os/exec"
+	"regexp"
+	"strconv"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var tool string
+var timeout time.Duration = 5 * time.Minute
+var refreshCommand []string = []string{"-n", "true"}
+
+// -----------------------------------------
+// public
+
+func Command(name string, args ...string) *exec.Cmd {
+	if tool == "" {
+		return log.Command(name, args...)
+	}
+	args = append([]string{name}, args...)
+	return log.Command(tool, args...)
+}
+
+func Run() {
+	exec.Command(tool, refreshCommand...).Run()
+}
+
+func Start() error {
+	err := detect()
+	if err != nil {
+		return err
+	}
+
+	// Automatically refresh privilege elevation to prevent user prompts
+	go func() {
+		for {
+			Run()
+			time.Sleep(timeout)
+		}
+	}()
+
+	return nil
+}
+
+// -----------------------------------------
+// private
+
+func detect() error {
+	tool = getTool()
+	if tool == "" {
+		return fmt.Errorf("no privilege elevation tool detected in PATH")
+	}
+
+	parseTimeout()
+	// We have to be a little faster than the actual timeout
+	timeout -= 30 * time.Second
+
+	return nil
+}
+
+func execLookPath(name string) string {
+	path, err := exec.LookPath(name)
+	if err != nil {
+		return ""
+	}
+	return path
+}
+
+func getTool() string {
+	sudo := execLookPath("sudo")
+	doas := execLookPath("doas")
+
+	if sudo != "" {
+		return "sudo"
+	}
+	if doas != "" {
+		return "doas"
+	}
+
+	return ""
+}
+
+func parseTimeout() {
+	switch tool {
+	case "sudo":
+		out, err := exec.Command("sudo", "sudo", "-V").CombinedOutput()
+		if err != nil {
+			return
+		}
+		re := regexp.MustCompile(`Authentication timestamp timeout: (\d+)\..*`)
+		matches := re.FindStringSubmatch(string(out))
+		if len(matches) == 2 {
+			if minutes, err := strconv.Atoi(matches[1]); err == nil {
+				timeout = time.Duration(minutes) * time.Minute
+			}
+		}
+	case "doas":
+		exec.Command("doas", "true").Run()
+	}
+}

pkg/fetch/alpm/alpm.go

@@ -0,0 +1,148 @@
+package alpm
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/Jguer/dyalpm"
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var (
+	Root        = "/"
+	PacmanState = "/var/lib/pacman"
+)
+
+type Handle struct {
+	handle  dyalpm.Handle
+	localDB dyalpm.Database
+	syncDBs []dyalpm.Database
+}
+
+func (h *Handle) LocalPackages() (map[string]dyalpm.Package, error) {
+	start := time.Now()
+	log.Debug("LocalPackages: starting...")
+
+	localPkgs := make(map[string]dyalpm.Package)
+
+	err := h.localDB.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+		localPkgs[pkg.Name()] = pkg
+		return nil
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to iterate local package cache: %w", err)
+	}
+
+	log.Debug("LocalPackages: done (%.2fs)", time.Since(start).Seconds())
+	return localPkgs, nil
+}
+
+func (h *Handle) FindProvidingPackage(depName string) (string, bool) {
+	pkg := h.handle.FindDBSatisfier(h.syncDBs, depName)
+	if pkg != nil {
+		return pkg.Name(), true
+	}
+	return "", false
+}
+
+func (h *Handle) Release() error {
+	if h.handle != nil {
+		h.handle.Release()
+	}
+	return nil
+}
+
+func (h *Handle) SyncPackages(pkgNames []string) (map[string]dyalpm.Package, error) {
+	start := time.Now()
+	log.Debug("SyncPackages: starting...")
+
+	syncPkgs := make(map[string]dyalpm.Package)
+	pkgSet := make(map[string]bool)
+	for _, name := range pkgNames {
+		pkgSet[name] = true
+	}
+
+	for _, db := range h.syncDBs {
+		err := db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+			if pkgSet[pkg.Name()] {
+				if _, exists := syncPkgs[pkg.Name()]; !exists {
+					syncPkgs[pkg.Name()] = pkg
+				}
+			}
+			return nil
+		})
+		if err != nil {
+			return nil, fmt.Errorf("failed to iterate sync database %s: %w", db.Name(), err)
+		}
+	}
+
+	log.Debug("SyncPackages: done (%.2fs)", time.Since(start).Seconds())
+	return syncPkgs, nil
+}
+
+func New() (*Handle, error) {
+	start := time.Now()
+	log.Debug("alpm.New: starting...")
+
+	handle, err := dyalpm.Initialize(Root, PacmanState)
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize alpm: %w", err)
+	}
+
+	localDB, err := handle.LocalDB()
+	if err != nil {
+		handle.Release()
+		return nil, fmt.Errorf("failed to get local database: %w", err)
+	}
+
+	syncDBs, err := handle.SyncDBs()
+	if err != nil {
+		handle.Release()
+		return nil, fmt.Errorf("failed to get sync databases: %w", err)
+	}
+
+	if len(syncDBs) == 0 {
+		syncDBs, err = registerSyncDBs(handle)
+		if err != nil {
+			handle.Release()
+			return nil, fmt.Errorf("failed to register sync databases: %w", err)
+		}
+	}
+
+	log.Debug("alpm.New: done (%.2fs)", time.Since(start).Seconds())
+	return &Handle{
+		handle:  handle,
+		localDB: localDB,
+		syncDBs: syncDBs,
+	}, nil
+}
+
+// -----------------------------------------
+// private
+
+func registerSyncDBs(handle dyalpm.Handle) ([]dyalpm.Database, error) {
+	log.Debug("registerSyncDBs: starting...")
+
+	repos := []string{"core", "extra", "multilib"}
+	var dbs []dyalpm.Database
+
+	for _, repo := range repos {
+		db, err := handle.RegisterSyncDB(repo, 0)
+		if err != nil {
+			continue
+		}
+
+		count := 0
+		db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+			count++
+			return nil
+		})
+
+		if count > 0 {
+			dbs = append(dbs, db)
+		}
+	}
+
+	log.Debug("registerSyncDBs: done (%d dbs)", len(dbs))
+	return dbs, nil
+}

pkg/fetch/aur/aur.go

@@ -0,0 +1,100 @@
+package aur
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var AURInfoURL = "https://aur.archlinux.org/rpc?v=5&type=info"
+
+type Package struct {
+	Name        string   `json:"Name"`
+	PackageBase string   `json:"PackageBase"`
+	Version     string   `json:"Version"`
+	URL         string   `json:"URL"`
+	Depends     []string `json:"Depends"`
+	MakeDepends []string `json:"MakeDepends"`
+}
+
+func (p Package) AllDepends() []string {
+	return append(p.Depends, p.MakeDepends...)
+}
+
+type Response struct {
+	Results []Package `json:"results"`
+}
+
+type Client struct {
+	cache map[string]Package
+}
+
+func New() *Client {
+	return &Client{
+		cache: make(map[string]Package),
+	}
+}
+
+func (c *Client) Fetch(packages []string) (map[string]Package, error) {
+	start := time.Now()
+	log.Debug("aur.Fetch: starting...")
+
+	result := make(map[string]Package)
+
+	if len(packages) == 0 {
+		return result, nil
+	}
+
+	var uncached []string
+	for _, pkg := range packages {
+		if _, ok := c.cache[pkg]; !ok {
+			uncached = append(uncached, pkg)
+		}
+	}
+
+	if len(uncached) == 0 {
+		log.Debug("aur.Fetch: done (cached) (%.2fs)", time.Since(start).Seconds())
+		for _, pkg := range packages {
+			result[pkg] = c.cache[pkg]
+		}
+		return result, nil
+	}
+
+	v := url.Values{}
+	for _, pkg := range packages {
+		v.Add("arg[]", pkg)
+	}
+
+	resp, err := http.Get(AURInfoURL + "&" + v.Encode())
+	if err != nil {
+		return result, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return result, err
+	}
+
+	var aurResp Response
+	if err := json.Unmarshal(body, &aurResp); err != nil {
+		return result, err
+	}
+
+	for _, r := range aurResp.Results {
+		c.cache[r.Name] = r
+		result[r.Name] = r
+	}
+
+	log.Debug("aur.Fetch: done (%.2fs)", time.Since(start).Seconds())
+	return result, nil
+}
+
+func (c *Client) Get(name string) (Package, bool) {
+	pkg, ok := c.cache[name]
+	return pkg, ok
+}

pkg/fetch/fetch.go

@@ -0,0 +1,154 @@
+package fetch
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/fetch/alpm"
+	"github.com/Riyyi/declpac/pkg/fetch/aur"
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+type PackageInfo struct {
+	Name      string
+	InAUR     bool
+	Exists    bool
+	Installed bool
+	Provided  string
+	AURInfo   *aur.Package
+}
+
+type Fetcher struct {
+	alpmHandle *alpm.Handle
+	aurClient  *aur.Client
+}
+
+// -----------------------------------------
+// constructor
+
+func New() (*Fetcher, error) {
+	start := time.Now()
+	log.Debug("fetch.Fetcher New: starting...")
+
+	alpmHandle, err := alpm.New()
+	if err != nil {
+		return nil, err
+	}
+
+	aurClient := aur.New()
+
+	log.Debug("fetch.Fetcher New: done (%.2fs)", time.Since(start).Seconds())
+	return &Fetcher{
+		alpmHandle: alpmHandle,
+		aurClient:  aurClient,
+	}, nil
+}
+
+// -----------------------------------------
+// public
+
+func (f *Fetcher) BuildLocalPkgMap() (map[string]interface{}, error) {
+	localPkgs, err := f.alpmHandle.LocalPackages()
+	if err != nil {
+		return nil, err
+	}
+	result := make(map[string]interface{})
+	for k, v := range localPkgs {
+		result[k] = v
+	}
+	return result, nil
+}
+
+func (f *Fetcher) Close() error {
+	return f.alpmHandle.Release()
+}
+
+func (f *Fetcher) FetchAur(packages []string) (map[string]aur.Package, error) {
+	return f.aurClient.Fetch(packages)
+}
+
+func (f *Fetcher) FindProvidingPackage(depName string) (string, bool) {
+	return f.alpmHandle.FindProvidingPackage(depName)
+}
+
+func (f *Fetcher) GetAURPackage(name string) (aur.Package, bool) {
+	return f.aurClient.Get(name)
+}
+
+func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error) {
+	start := time.Now()
+	log.Debug("fetch.Resolve: starting...")
+
+	result := make(map[string]*PackageInfo)
+	for _, pkg := range packages {
+		result[pkg] = &PackageInfo{Name: pkg, Exists: false}
+	}
+
+	syncPkgs, err := f.alpmHandle.SyncPackages(packages)
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("fetch.Resolve: sync db check done (%.2fs)", time.Since(start).Seconds())
+
+	for pkg := range syncPkgs {
+		result[pkg].Exists = true
+		result[pkg].InAUR = false
+	}
+
+	localPkgs, err := f.alpmHandle.LocalPackages()
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("fetch.Resolve: local pkgs built (%.2fs)", time.Since(start).Seconds())
+
+	for pkg := range localPkgs {
+		if info, ok := result[pkg]; ok {
+			info.Installed = true
+		}
+	}
+
+	var notInSync []string
+	for _, pkg := range packages {
+		if !result[pkg].Exists {
+			notInSync = append(notInSync, pkg)
+		}
+	}
+
+	if len(notInSync) > 0 {
+		if _, err := f.aurClient.Fetch(notInSync); err != nil {
+			log.Debug("fetch.Resolve: aur fetch error: %v", err)
+		}
+
+		for _, pkg := range packages {
+			info := result[pkg]
+			if info.Exists {
+				continue
+			}
+
+			if aurInfo, ok := f.aurClient.Get(pkg); ok {
+				info.InAUR = true
+				info.AURInfo = &aurInfo
+				continue
+			}
+
+			if providedBy, ok := f.FindProvidingPackage(pkg); ok {
+				log.Debug("fetch.Resolve: %s provided by %s", pkg, providedBy)
+				info.Provided = providedBy
+				info.Exists = true
+				continue
+			}
+
+			return nil, fmt.Errorf("package not found: %s", pkg)
+		}
+	}
+
+	for _, pkg := range packages {
+		info := result[pkg]
+		if !info.Exists && !info.InAUR {
+			return nil, fmt.Errorf("package not validated: %s", pkg)
+		}
+	}
+
+	log.Debug("fetch.Resolve: done (%.2fs)", time.Since(start).Seconds())
+	return result, nil
+}

pkg/input/input.go

@@ -0,0 +1,115 @@
+package input
+
+import (
+	"bufio"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/Riyyi/declpac/pkg/lib"
+)
+
+var ErrEmptyList = errors.New("package list is empty")
+
+// -----------------------------------------
+// public
+
+func Merge(packages map[string]bool) ([]string, error) {
+	result := make([]string, 0, len(packages))
+	for name := range packages {
+		result = append(result, name)
+	}
+	if len(result) == 0 {
+		return nil, ErrEmptyList
+	}
+	return result, nil
+}
+
+func ReadPackages(stateFiles []string) (map[string]bool, error) {
+	packages := make(map[string]bool)
+
+	for _, file := range stateFiles {
+		expanded := lib.ExpandPath(file)
+		if err := readStateFile(expanded, packages); err != nil {
+			return nil, err
+		}
+	}
+
+	implicitStateFile := getImplicitStateFile()
+	if fileExists(implicitStateFile) {
+		if err := readStateFile(implicitStateFile, packages); err != nil {
+			return nil, err
+		}
+	}
+
+	if err := readStdin(packages); err != nil {
+		return nil, err
+	}
+
+	return packages, nil
+}
+
+// -----------------------------------------
+// private
+
+func fileExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}
+
+func getImplicitStateFile() string {
+	cfgDir := os.Getenv("XDG_CONFIG_HOME")
+	if cfgDir == "" {
+		cfgDir = "~/.config"
+	}
+	cfgDir = lib.ExpandPath(cfgDir)
+	return filepath.Join(cfgDir, "declpac")
+}
+
+func normalizePackageName(name string) string {
+	name = strings.TrimSpace(name)
+	if name == "" || strings.HasPrefix(name, "#") {
+		return ""
+	}
+	return name
+}
+
+func readStateFile(path string, packages map[string]bool) error {
+	file, err := os.Open(path)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		name := normalizePackageName(scanner.Text())
+		if name != "" {
+			packages[name] = true
+		}
+	}
+
+	return scanner.Err()
+}
+
+func readStdin(packages map[string]bool) error {
+	info, err := os.Stdin.Stat()
+	if err != nil {
+		return err
+	}
+
+	if (info.Mode() & os.ModeCharDevice) != 0 {
+		return nil
+	}
+
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		name := normalizePackageName(scanner.Text())
+		if name != "" {
+			packages[name] = true
+		}
+	}
+
+	return scanner.Err()
+}

pkg/lib/lib.go

@@ -0,0 +1,21 @@
+package lib
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// -----------------------------------------
+// public
+
+func ExpandPath(path string) string {
+	if strings.HasPrefix(path, "~/") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return path
+		}
+		return filepath.Join(home, path[2:])
+	}
+	return path
+}

pkg/log/log.go

@@ -0,0 +1,74 @@
+package log
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/lib"
+)
+
+var logFile *os.File
+var Verbose bool
+
+// -----------------------------------------
+// public
+
+func Close() error {
+	if logFile == nil {
+		return nil
+	}
+	return logFile.Close()
+}
+
+func Command(name string, args ...string) *exec.Cmd {
+	cmdStr := name + " " + strings.Join(args, " ")
+	fmt.Fprintf(logFile, "[cmd] %s\n", cmdStr)
+	return exec.Command(name, args...)
+}
+
+func Debug(format string, args ...any) {
+	if !Verbose {
+		return
+	}
+	fmt.Fprintf(os.Stderr, "[debug] "+format+"\n", args...)
+}
+
+func GetLogWriter() io.Writer {
+	return logFile
+}
+
+func OpenLog() error {
+	stateDir := os.Getenv("XDG_STATE_HOME")
+	if stateDir == "" {
+		stateDir = "~/.local/state"
+	}
+	stateDir = lib.ExpandPath(stateDir)
+
+	logPath := filepath.Join(stateDir, "declpac.log")
+	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+
+	logFile = f
+	writeTimestamp()
+	return nil
+}
+
+func Write(msg []byte) {
+	logFile.Write(msg)
+}
+
+// -----------------------------------------
+// private
+
+func writeTimestamp() {
+	ts := time.Now().Format("2006-01-02 15:04:05")
+	header := fmt.Sprintf("\n--- %s ---\n", ts)
+	logFile.Write([]byte(header))
+}

pkg/output/output.go

@@ -0,0 +1,30 @@
+package output
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Result struct {
+	Installed int
+	Removed   int
+	ToInstall []string
+	ToRemove  []string
+}
+
+// -----------------------------------------
+// public
+
+func Format(r *Result) string {
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("installed %d packages, removed %d packages", r.Installed, r.Removed))
+	if len(r.ToInstall) > 0 {
+		b.WriteString("\nwould install: ")
+		b.WriteString(strings.Join(r.ToInstall, ", "))
+	}
+	if len(r.ToRemove) > 0 {
+		b.WriteString("\nwould remove: ")
+		b.WriteString(strings.Join(r.ToRemove, ", "))
+	}
+	return b.String()
+}

pkg/pacman/pacman.go

@@ -0,0 +1,217 @@
+package pacman
+
+import (
+	"fmt"
+	"os"
+	"slices"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/log"
+	"github.com/Riyyi/declpac/pkg/output"
+	"github.com/Riyyi/declpac/pkg/pacman/read"
+	"github.com/Riyyi/declpac/pkg/pacman/sync"
+)
+
+func Sync(packages []string, noCheck bool, prune bool) (*output.Result, error) {
+	start := time.Now()
+	log.Debug("Sync: starting...")
+
+	explicitList, err := read.ExplicitList()
+	if err != nil {
+		return nil, err
+	}
+	explicitCount := len(explicitList)
+
+	if !noCheck && len(packages) < explicitCount/2 {
+		errMsg := "safety check: state packages (%d) less than half of explicitly installed (%d), override with --nocheck"
+		return nil, fmt.Errorf(errMsg, len(packages), explicitCount)
+	}
+
+	list, err := read.List()
+	if err != nil {
+		return nil, err
+	}
+	before := len(list)
+
+	fresh, err := read.DBFreshness()
+	if err != nil {
+		return nil, err
+	}
+	if !fresh {
+		if err := sync.RefreshDB(log.GetLogWriter()); err != nil {
+			return nil, err
+		}
+	}
+	log.Debug("Sync: database fresh (%.2fs)", time.Since(start).Seconds())
+
+	f, err := fetch.New()
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	log.Debug("Sync: initialized fetcher (%.2fs)", time.Since(start).Seconds())
+
+	log.Debug("Sync: categorizing packages...")
+	pacmanPkgs, aurPkgs, err := categorizePackages(f, packages)
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("Sync: packages categorized (%.2fs)", time.Since(start).Seconds())
+
+	if len(pacmanPkgs) > 0 {
+		log.Debug("Sync: syncing %d pacman packages...", len(pacmanPkgs))
+		if err := sync.SyncPackages(pacmanPkgs, log.GetLogWriter()); err != nil {
+			return nil, err
+		}
+		log.Debug("Sync: pacman packages synced (%.2fs)", time.Since(start).Seconds())
+	}
+
+	for _, pkg := range aurPkgs {
+		if slices.Contains(list, pkg) {
+			continue
+		}
+		log.Debug("Sync: installing AUR package %s...", pkg)
+		aurInfo, ok := f.GetAURPackage(pkg)
+		if !ok {
+			return nil, fmt.Errorf("AUR package not found in cache: %s", pkg)
+		}
+		if err := sync.InstallAUR(f, pkg, aurInfo.PackageBase, false, log.GetLogWriter()); err != nil {
+			return nil, err
+		}
+		log.Debug("Sync: AUR package %s installed (%.2fs)", pkg, time.Since(start).Seconds())
+	}
+
+	var removed int
+	if prune {
+		log.Debug("Sync: running prune sanity check...")
+		if err := pruneSanityCheck(packages); err != nil {
+			return nil, err
+		}
+		log.Debug("Sync: prune sanity check passed (%.2fs)", time.Since(start).Seconds())
+
+		log.Debug("Sync: marking all as deps...")
+		if err := markAllAsDeps(); err != nil {
+			return nil, err
+		}
+		log.Debug("Sync: all marked as deps (%.2fs)", time.Since(start).Seconds())
+
+		log.Debug("Sync: marking state packages as explicit...")
+		if err := sync.MarkAs(packages, "explicit", log.GetLogWriter()); err != nil {
+			fmt.Fprintf(os.Stderr, "warning: could not mark state packages as explicit: %v\n", err)
+		}
+		log.Debug("Sync: state packages marked as explicit (%.2fs)", time.Since(start).Seconds())
+
+		removed, err = cleanupOrphans()
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	list, _ = read.List()
+	if err != nil {
+		return nil, err
+	}
+	after := len(list)
+
+	installedCount := max(after-before, 0)
+
+	log.Debug("Sync: done (%.2fs)", time.Since(start).Seconds())
+	return &output.Result{
+		Installed: installedCount,
+		Removed:   removed,
+	}, nil
+}
+
+// -----------------------------------------
+// private
+
+func categorizePackages(f *fetch.Fetcher, packages []string) (pacmanPkgs, aurPkgs []string, err error) {
+	start := time.Now()
+	log.Debug("categorizePackages: starting...")
+
+	resolved, err := f.Resolve(packages)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	for _, pkg := range packages {
+		info := resolved[pkg]
+		if info == nil || (!info.Exists && !info.InAUR) {
+			fmt.Fprintf(os.Stderr, "error: package not found: %s\n", pkg)
+			continue
+		}
+		if info.InAUR {
+			aurPkgs = append(aurPkgs, pkg)
+		} else {
+			pacmanPkgs = append(pacmanPkgs, pkg)
+		}
+	}
+
+	log.Debug("categorizePackages: done (%.2fs)", time.Since(start).Seconds())
+	return pacmanPkgs, aurPkgs, nil
+}
+
+func cleanupOrphans() (int, error) {
+	start := time.Now()
+	log.Debug("cleanupOrphans: starting...")
+
+	orphans, err := read.ListOrphans()
+	if err != nil {
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return 0, err
+	}
+
+	removed, err := sync.RemoveOrphans(orphans, log.GetLogWriter())
+	if err != nil {
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return 0, err
+	}
+
+	log.Debug("cleanupOrphans: done (%.2fs)", time.Since(start).Seconds())
+	return removed, nil
+}
+
+func markAllAsDeps() error {
+	start := time.Now()
+	log.Debug("markAllAsDeps: starting...")
+
+	packages, err := read.List()
+	if err != nil || len(packages) == 0 {
+		return fmt.Errorf("failed to list packages: %w", err)
+	}
+
+	if err := sync.MarkAs(packages, "deps", log.GetLogWriter()); err != nil {
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return err
+	}
+
+	log.Debug("markAllAsDeps: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}
+
+// pruneSanityCheck checks if the installation of all state packages succeeded,
+// before attempting to do package marking and orphan cleanup.
+func pruneSanityCheck(statePackages []string) error {
+	start := time.Now()
+	log.Debug("pruneSanityCheck: starting...")
+
+	localPackages, err := read.List()
+	if err != nil {
+		return fmt.Errorf("failed to list local packages: %w", err)
+	}
+
+	var missing []string
+	for _, pkg := range statePackages {
+		if !slices.Contains(localPackages, pkg) {
+			missing = append(missing, pkg)
+		}
+	}
+
+	if len(missing) > 0 {
+		return fmt.Errorf("safety check: missing state packages: %v", missing)
+	}
+
+	log.Debug("pruneSanityCheck: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}

pkg/pacman/read/read.go

@@ -0,0 +1,149 @@
+package read
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/log"
+	"github.com/Riyyi/declpac/pkg/output"
+)
+
+var LockFile = "/var/lib/pacman/db.lock"
+
+func DBFreshness() (bool, error) {
+	info, err := os.Stat(LockFile)
+	if err != nil {
+		return false, nil
+	}
+
+	age := time.Since(info.ModTime())
+	return age <= 24*time.Hour, nil
+}
+
+func DryRun(packages []string) (*output.Result, error) {
+	start := time.Now()
+	log.Debug("DryRun: starting...")
+
+	f, err := fetch.New()
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	log.Debug("DryRun: initialized fetcher (%.2fs)", time.Since(start).Seconds())
+
+	resolved, err := f.Resolve(packages)
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("DryRun: packages resolved (%.2fs)", time.Since(start).Seconds())
+
+	var toInstall []string
+	var aurPkgs []string
+	for _, pkg := range packages {
+		info := resolved[pkg]
+		if info == nil || (!info.Exists && !info.InAUR) {
+			return nil, fmt.Errorf("package not found: %s", pkg)
+		}
+		if info.InAUR && !info.Installed {
+			aurPkgs = append(aurPkgs, pkg)
+		} else if !info.Installed {
+			toInstall = append(toInstall, pkg)
+		}
+	}
+	log.Debug("DryRun: packages categorized (%.2fs)", time.Since(start).Seconds())
+
+	orphans, err := ListOrphans()
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("DryRun: orphans listed (%.2fs)", time.Since(start).Seconds())
+
+	pkgSet := make(map[string]bool)
+	for _, p := range packages {
+		pkgSet[p] = true
+	}
+	var toRemove []string
+	for _, o := range orphans {
+		if !pkgSet[o] {
+			toRemove = append(toRemove, o)
+		}
+	}
+
+	log.Debug("DryRun: done (%.2fs)", time.Since(start).Seconds())
+	return &output.Result{
+		Installed: len(toInstall) + len(aurPkgs),
+		Removed:   len(toRemove),
+		ToInstall: append(toInstall, aurPkgs...),
+		ToRemove:  toRemove,
+	}, nil
+}
+
+func ExplicitList() ([]string, error) {
+	start := time.Now()
+	log.Debug("ExplicitList: starting...")
+
+	cmd := exec.Command("pacman", "-Qqe")
+	output, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+
+	list := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if len(list) > 0 && list[0] == "" {
+		list = nil
+	}
+
+	log.Debug("ExplicitList: done (%.2fs)", time.Since(start).Seconds())
+	return list, nil
+}
+
+func List() ([]string, error) {
+	start := time.Now()
+	log.Debug("List: starting...")
+
+	cmd := exec.Command("pacman", "-Qq")
+	output, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+
+	list := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if list[0] == "" {
+		list = nil
+	}
+
+	log.Debug("List: done (%.2fs)", time.Since(start).Seconds())
+	return list, nil
+}
+
+func ListOrphans() ([]string, error) {
+	start := time.Now()
+	log.Debug("ListOrphans: starting...")
+
+	cmd := exec.Command("pacman", "-Qdtq")
+	var stderr bytes.Buffer
+	cmd.Stderr = &stderr
+
+	output, err := cmd.Output()
+	if err != nil {
+		var exitErr *exec.ExitError
+		if errors.As(err, &exitErr) && exitErr.ExitCode() == 1 && stderr.Len() == 0 {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	orphans := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if len(orphans) > 0 && orphans[0] == "" {
+		orphans = orphans[1:]
+	}
+
+	log.Debug("ListOrphans: done (%.2fs)", time.Since(start).Seconds())
+	return orphans, nil
+}

pkg/pacman/sync/sync.go

@@ -0,0 +1,318 @@
+package sync
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/user"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/auth"
+	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/fetch/aur"
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+type Result struct {
+	Installed int
+	Removed   int
+}
+
+// -----------------------------------------
+// public
+
+func InstallAUR(f *fetch.Fetcher, pkgName string, packageBase string, asDeps bool, logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("InstallAUR: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	aurInfo := getAURInfo(f, pkgName, packageBase)
+	if err := resolveAndInstallDeps(f, aurInfo, logWriter); err != nil {
+		return err
+	}
+
+	tmpDir := getTempDirName() + "/" + pkgName
+	if err := createTempDir(tmpDir); err != nil {
+		return err
+	}
+	defer os.RemoveAll(tmpDir)
+
+	if err := cloneRepo(packageBase, tmpDir, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: cloned (%.2fs)", time.Since(start).Seconds())
+
+	if err := buildPackage(tmpDir, asDeps, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: built (%.2fs)", time.Since(start).Seconds())
+
+	pkgFile, err := findPKGFile(pkgName, tmpDir)
+	if err != nil {
+		return fmt.Errorf("failed to find built package: %w", err)
+	}
+
+	if err := installBuiltPackage(pkgFile, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: done (%.2fs)", time.Since(start).Seconds())
+
+	return nil
+}
+
+func MarkAs(packages []string, flag string, logWriter io.Writer) error {
+	if len(packages) == 0 {
+		return nil
+	}
+	start := time.Now()
+	flagName := map[string]string{"deps": "asdeps", "explicit": "asexplicit"}[flag]
+	log.Debug("MarkAs(%s): starting...", flag)
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	args := append([]string{"-D", "--" + flagName}, packages...)
+	cmd := auth.Command("pacman", args...)
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("mark as %s failed: %w", flag, err)
+	}
+
+	log.Debug("MarkAs(%s): done (%.2fs)", flag, time.Since(start).Seconds())
+	return nil
+}
+
+func RefreshDB(logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("RefreshDB: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	cmd := auth.Command("pacman", "-Syy")
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to refresh pacman database: %w", err)
+	}
+
+	log.Debug("RefreshDB: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}
+
+func RemoveOrphans(orphans []string, logWriter io.Writer) (int, error) {
+	start := time.Now()
+	log.Debug("RemoveOrphans: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	if len(orphans) == 0 {
+		log.Debug("RemoveOrphans: done (no orphans) (%.2fs)", time.Since(start).Seconds())
+		return 0, nil
+	}
+
+	args := make([]string, 0, 3+len(orphans))
+	args = append(args, "pacman", "-Rns", "--noconfirm")
+	args = append(args, orphans...)
+	removeCmd := auth.Command(args[0], args[1:]...)
+	removeCmd.Stdout = logWriter
+	removeCmd.Stderr = logWriter
+	err := removeCmd.Run()
+	if err != nil {
+		return 0, fmt.Errorf("remove orphans failed: %w", err)
+	}
+
+	count := len(orphans)
+
+	log.Debug("RemoveOrphans: done (%d) (%.2fs)", count, time.Since(start).Seconds())
+	return count, nil
+}
+
+func SyncPackages(packages []string, logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("SyncPackages: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	args := append([]string{"-S", "--needed", "--noconfirm"}, packages...)
+	cmd := auth.Command("pacman", args...)
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("pacman sync failed: %w", err)
+	}
+
+	log.Debug("SyncPackages: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}
+
+// -----------------------------------------
+// private
+
+func buildPackage(tmpDir string, asDeps bool, logWriter io.Writer) error {
+	makepkgArgs := []string{"-D", tmpDir, "-s", "--noconfirm"}
+	if asDeps {
+		makepkgArgs = append(makepkgArgs, "--asdeps")
+	}
+	makepkgCmd := log.Command("makepkg", makepkgArgs...)
+	makepkgCmd.Stdout = logWriter
+	makepkgCmd.Stderr = logWriter
+	if err := makepkgCmd.Run(); err != nil {
+		return fmt.Errorf("makepkg failed to build AUR package: %w", err)
+	}
+	return nil
+}
+
+func cloneRepo(packageBase string, tmpDir string, logWriter io.Writer) error {
+	cloneURL := "https://aur.archlinux.org/" + packageBase + ".git"
+	cloneCmd := log.Command("git", "clone", cloneURL, tmpDir)
+	cloneCmd.Stdout = logWriter
+	cloneCmd.Stderr = logWriter
+	if err := cloneCmd.Run(); err != nil {
+		return fmt.Errorf("failed to clone AUR repo: %w", err)
+	}
+	return nil
+}
+
+func createTempDir(tmpDir string) error {
+	if tmpDir == "" || tmpDir == "/" || !strings.HasPrefix(tmpDir, "/tmp") {
+		return fmt.Errorf("safety check: prevented malformed rm -rf call")
+	}
+
+	rmdirCmd := log.Command("rm", "-rf", tmpDir)
+	if err := rmdirCmd.Run(); err != nil {
+		return fmt.Errorf("failed to remove temp directory: %w", err)
+	}
+
+	mkdirCmd := log.Command("mkdir", "-p", tmpDir)
+	if err := mkdirCmd.Run(); err != nil {
+		return fmt.Errorf("failed to create temp directory: %w", err)
+	}
+
+	return nil
+}
+
+func findPKGFile(pkgName string, dir string) (string, error) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return "", err
+	}
+	for _, entry := range entries {
+		name := entry.Name()
+		if !strings.HasSuffix(name, ".pkg.tar.zst") && !strings.HasSuffix(name, ".pkg.tar.gz") {
+			continue
+		}
+		// Skip packages that do not start with the exact package name, ex: sunshine-bin -> sunshine
+		if !strings.HasPrefix(name, pkgName) {
+			continue
+		}
+		// Skip packages that provide a debug package, ex: sunshine-bin -> sunshine-debug
+		if strings.HasPrefix(name, pkgName+"-debug") {
+			continue
+		}
+		return strings.Join([]string{dir, name}, "/"), nil
+	}
+	return "", fmt.Errorf("no package file found in %s", dir)
+}
+
+func getAURInfo(f *fetch.Fetcher, pkgName string, packageBase string) *aur.Package {
+	if packageBase == "" {
+		return nil
+	}
+	info, ok := f.GetAURPackage(pkgName)
+	if !ok {
+		return nil
+	}
+	return &info
+}
+
+func getTempDirName() string {
+	user, err := user.Current()
+	if err != nil {
+		return "/tmp/declpac"
+	}
+
+	return "/tmp/declpac-" + user.Username
+}
+
+func installBuiltPackage(pkgFile string, logWriter io.Writer) error {
+	installCmd := auth.Command("pacman", "-U", "--noconfirm", pkgFile)
+	installCmd.Stdout = logWriter
+	installCmd.Stderr = logWriter
+	if err := installCmd.Run(); err != nil {
+		return fmt.Errorf("failed to install package: %w", err)
+	}
+	return nil
+}
+
+func resolveAndInstallDeps(f *fetch.Fetcher, aurInfo *aur.Package, logWriter io.Writer) error {
+	if aurInfo == nil {
+		return nil
+	}
+
+	depends := aurInfo.AllDepends()
+	if len(depends) == 0 {
+		return nil
+	}
+
+	resolved, err := f.Resolve(depends)
+	if err != nil {
+		return fmt.Errorf("failed to resolve dependencies: %w", err)
+	}
+
+	var repoDeps, aurDeps []string
+	for _, dep := range depends {
+		info := resolved[dep]
+		if info.Installed {
+			continue
+		}
+		pkg := dep
+		if info.Provided != "" {
+			pkg = info.Provided
+		}
+		if info.Exists {
+			repoDeps = append(repoDeps, pkg)
+		} else if info.InAUR {
+			aurDeps = append(aurDeps, pkg)
+		}
+	}
+
+	if len(repoDeps) > 0 {
+		if err := SyncPackages(repoDeps, logWriter); err != nil {
+			return fmt.Errorf("failed to install repo dependencies: %w", err)
+		}
+	}
+
+	if len(aurDeps) == 0 {
+		return nil
+	}
+
+	fetched, err := f.FetchAur(aurDeps)
+	if err != nil {
+		log.Debug("sync.resolveAndInstallDeps: aur fetch error: %v", err)
+	}
+	for _, dep := range aurDeps {
+		depInfo, ok := fetched[dep]
+		if !ok {
+			continue
+		}
+		if err := InstallAUR(f, dep, depInfo.PackageBase, true, logWriter); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

skills-lock.json

@@ -5,6 +5,12 @@
       "source": "JuliusBrussee/caveman",
       "sourceType": "github",
       "computedHash": "a818cdc41dcfaa50dd891c5cb5e5705968338de02e7e37949ca56e8c30ad4176"
+    },
+    "grill-me": {
+      "source": "mattpocock/skills",
+      "sourceType": "github",
+      "skillPath": "skills/productivity/grill-me/SKILL.md",
+      "computedHash": "784f0dbb7403b0f00324bce9a112f715342777a0daee7bbb7385f9c6f0a170ea"
     }
   }
 }