feat(acp): support built-in slash commands in ACP runtime - #2060
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Add /help, /clear, /compact, /status built-in commands to the ACP server runtime. Commands are advertised to clients via AvailableCommandsUpdate after session creation, and intercepted server-side before forwarding to the LLM. Closes GCWing#1118
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Three afternoon PRs ballooned to ~8.8k added lines because the agent branched its fix worktrees from the host checkout's HEAD, which sat on the in-flight feature branch; the whole feature diff rode along into each PR. The preamble now requires basing every fix branch on origin/<default> after a fetch, never on the host checkout's current branch. The three contaminated branches were rebased onto origin/main and force-pushed (PRs GCWing#2058/GCWing#2059/GCWing#2060 now carry only their own fix). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Summary
Adds built-in slash command support to the BitFun ACP (Agent Client Protocol) server runtime.
Changes
New module
runtime/commands.rs: Defines four built-in commands (/help,/clear,/compact,/status) and provides:builtin_commands()— returns the command list for client advertisementadvertise_builtin_commands()— sendsAvailableCommandsUpdateto the client after session creation (errors are logged, never block session setup)try_handle_builtin_command()— intercepts slash commands server-side before forwarding to the LLM, returning a response directly for known commandsruntime/session.rs: Callsadvertise_builtin_commandsafterpublish_active_sessionsucceeds in bothcreate_sessionandrestore_sessionruntime/prompt.rs: Intercepts built-in slash commands inrun_promptbefore the normal agent dialog submissionruntime.rs: Registers the newcommandsmoduleTest plan
cargo check -p bitfun-acppassescargo test -p bitfun-acp— all 115 tests pass (including 3 new unit tests for command uniqueness, help text completeness, and status text fields)cargo clippy -p bitfun-acp— no new warningsCloses #1118