YeonGyu-Kim f877acacbf feat: #146 — wire claw config and claw diff as standalone subcommands
## Problem

`claw config` and `claw diff` are pure-local read-only introspection
commands (config merges .claw.json + .claw/settings.json from disk; diff
shells out to `git diff --cached` + `git diff`). Neither needs a session
context, yet both rejected direct CLI invocation:

$ claw config
error: `claw config` is a slash command. Use `claw --resume SESSION.jsonl /config` ...

$ claw diff
error: `claw diff` is a slash command. ...

This forced clawing operators to spin up a full session just to inspect
static disk state, and broke natural pipelines like
`claw config --output-format json | jq`.

## Root cause

Sibling of #145: `SlashCommand::Config { section }` and
`SlashCommand::Diff` had working renderers (`render_config_report`,
`render_config_json`, `render_diff_report`, `render_diff_json_for`)
exposed for resume sessions, but the top-level CLI parser in
`parse_subcommand()` had no arms for them. Zero-arg `config`/`diff`
hit `parse_single_word_command_alias`'s fallback to
`bare_slash_command_guidance`, producing the misleading guidance.

## Changes

### rust/crates/rusty-claude-cli/src/main.rs

- Added `CliAction::Config { section, output_format }` and
  `CliAction::Diff { output_format }` variants.
- Added `"config"` / `"diff"` arms to the top-level parser in
  `parse_subcommand()`. `config` accepts an optional section name
  (env|hooks|model|plugins) matching SlashCommand::Config semantics.
  `diff` takes no positional args. Both reject extra trailing args
  with a clear error.
- Added `"config" | "diff" => None` to
  `parse_single_word_command_alias` so bare invocations fall through
  to the new parser arms instead of the slash-guidance error.
- Added dispatch in run() that calls existing renderers: text mode uses
  `render_config_report` / `render_diff_report`; JSON mode uses
  `render_config_json` / `render_diff_json_for` with
  `serde_json::to_string_pretty`.
- Added 5 regression assertions in parse_args test covering:
  parse_args(["config"]), parse_args(["config", "env"]),
  parse_args(["config", "--output-format", "json"]),
  parse_args(["diff"]), parse_args(["diff", "--output-format", "json"]).

### ROADMAP.md

Added Pinpoint #146 documenting the gap, verification, root cause,
fix shape, and acceptance. Explicitly notes which other slash commands
(`hooks`, `usage`, `context`, etc.) are NOT candidates because they
are session-state-modifying.

## Live verification

$ claw config   # no config files
Config
  Working directory /private/tmp/cd-146-verify
  Loaded files      0
  Merged keys       0
Discovered files
  user    missing ...
  project missing ...
  local   missing ...
Exit 0.

$ claw config --output-format json
{
  "cwd": "...",
  "files": [...],
  ...
}

$ claw diff   # no git
Diff
  Result           no git repository
  Detail           ...
Exit 0.

$ claw diff --output-format json   # inside claw-code
{
  "kind": "diff",
  "result": "changes",
  "staged": "",
  "unstaged": "diff --git ..."
}
Exit 0.

## Tests

- rusty-claude-cli bin: 177 tests pass (5 new assertions in parse_args)
- Full workspace green except pre-existing resume_latest flake (unrelated)

## Not changed

`hooks`, `usage`, `context`, `tasks`, `theme`, `voice`, `rename`,
`copy`, `color`, `effort`, `branch`, `rewind`, `ide`, `tag`,
`output-style`, `add-dir` — all session-mutating or interactive-only;
correctly remain slash-only.

Closes ROADMAP #146.
2026-04-21 20:07:28 +09:00
..