Add ParseSlashCommand for parsing AI assistant slash commands with bash-like arguments

[Copilot]

Implementation Plan for Slash Command Parser

Based on the feedback to parse arguments like Bash with $ARGUMENTS, $1, $2, $3:

• Create pkg/slashcommand directory structure
• Implement ParseSlashCommand function with bash-like argument parsing
• Create comprehensive table-driven tests following the repository's testing standards
• Handle edge cases (missing slash, no params, quoted values with commas, etc.)
• Ensure the function returns taskName (string), params (map[string]string), and error
• Run linting and tests to validate implementation
• Document the function with clear examples
• Add package README with usage examples
• Add example tests for documentation
• Update to bash-like argument parsing per feedback
• Remove old key=value parameter parsing functions

Implementation Complete ✅

The parser now uses bash-like argument parsing:

• /fix-bug 123 → $ARGUMENTS="123", $1="123"
• /code-review "PR #42" high → $ARGUMENTS="\"PR #42\" high", $1="PR #42", $2="high"

Features:

• Parses slash commands with bash-like arguments: /task-name arg1 "arg 2" arg3
• Returns $ARGUMENTS with full argument string (quotes preserved)
• Returns $1, $2, $3 etc. as positional arguments (quotes removed)
• Supports both single and double quotes
• Escape sequences work in double quotes (\")
• Single quotes preserve everything literally
• Comprehensive test coverage with 20 test cases
• Removed unused key=value parsing functions (ParseParams, parseKeyValuePairs)

All tests pass successfully! The package is ready to use.

Original prompt

Examine https://opencode.ai/docs/commands/. I'd like to provide a pkg/slashcommand/ParseSlachCommand(string) (taskName, params, err)

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[alexec]

@copilot What does OpenCode do for this?

[Copilot]

@copilot What does OpenCode do for this?

I researched OpenCode (now continued as Crush by Charm) but couldn't find specific documentation about their slash command format since the original opencode.ai/docs/commands/ URL is not accessible and the project has been archived.

Based on the codebase, I can see this project already supports OpenCode's .opencode/command directory for task files (like in integration_test.go). The slash command parser I implemented follows common AI assistant patterns (similar to GitHub Copilot, Cursor, etc.) with the format /task-name param="value".

If you have specific documentation about OpenCode's slash command format or a different format you'd like me to follow, I'd be happy to adjust the implementation.

[alexec]

@copilot The parser should extract the arguments as follows:

$ARGUMENTS - the whole string
$1,$2,$3 - the positional arguments, parsed like Bash

[alexec]

@copilot you can remove support for the old key=vale syntax for parameters.

[Copilot]

@copilot The parser should extract the arguments as follows:

$ARGUMENTS - the whole string...

Updated the parser to use bash-like argument parsing. The function now returns:

• params["ARGUMENTS"] - the full argument string (with quotes preserved)
• params["1"], params["2"], params["3"] - positional arguments (with quotes removed)

Both single and double quotes are supported, and escape sequences work in double quotes. Commit: 138f60f

[Copilot]

@copilot you can remove support for the old key=vale syntax for parameters.

Removed the old key=value parsing functions (ParseParams and parseKeyValuePairs). The Params type and its Set() method are kept as they're still used by the -p flag parsing. Commit: 042a8a0