fix(commands): normalize gsd slash namespace drift (#2858)

* fix(commands): normalize gsd slash namespace drift

* fix(#2855): address CodeRabbit findings on namespace drift PR

Three CR findings, all valid:

1. autonomous.md line 783 still had `gsd:discuss-phase` (the PR's own
   normalization missed this line). Switched to `gsd-discuss-phase` and
   updated the matching test in autonomous-interactive.test.cjs that was
   asserting the now-retired colon form.

2. tests/bug-2543-gsd-slash-namespace.test.cjs source-grepped the
   fix-slash-commands.cjs script with .includes() rather than driving
   its transform behaviour. Refactored fix-slash-commands.cjs to export
   a pure transformContent(src, cmdNames) function, kept the CLI behaviour
   unchanged via require.main, and replaced the source-grep block with
   five behavioural cases: rewrite, multi-occurrence, idempotence on
   canonical input, no-op on gsd-sdk/gsd-tools, and word-boundary safety.

3. tests/bug-2808-skill-hyphen-name.test.cjs matched `name:` anywhere
   in SKILL.md; a stray name: in the body could satisfy the assertion.
   Scoped the lookup to the YAML frontmatter block via the suggested
   diff (parse the leading --- ... --- region first, then find name:
   inside it).

Full suite: 5854/5854 passing.

* fix(#2855): address remaining CodeRabbit findings on PR #2858

Three structural concerns flagged on the namespace-drift fix PR:

1. scripts/fix-slash-commands.cjs:24 — `buildPattern([])` compiled
   `/gsd:()(?=[^a-zA-Z0-9_-]|$)/g`. The empty capture group still
   matches any `/gsd:` token followed by a non-word boundary
   (whitespace, EOL, punctuation), rewriting it to a stray `/gsd-`.
   Verified live: `transformContent("/gsd:", [])` → `"/gsd-"`. Added
   a guard returning null from `buildPattern` on empty input and
   updated `transformContent` and `processDir` to no-op when the
   pattern is null.

2. tests/autonomous-interactive.test.cjs:44-47 — assertion was
   `content.includes('gsd-discuss-phase') && content.includes('INTERACTIVE')`,
   which would false-pass on any unrelated co-occurrence (e.g.
   `INTERACTIVE=""` initialization plus a stray `gsd-discuss-phase`
   prose mention). Replaced with a structural extraction: locate the
   `**If \`INTERACTIVE\` is set:**` branch, bound it by the next
   `**If` / `<step>` boundary, and assert the
   `Skill(skill="gsd-discuss-phase", ...)` invocation lives inside
   that region. Tolerates whitespace around `(`, `skill`, and `=`.

3. tests/bug-2808-skill-hyphen-name.test.cjs:104 — colon-call regex
   was `Skill\(skill=...` and missed valid formatting like
   `Skill(skill = "gsd:cmd")` or `Skill( skill = ...)`. Loosened to
   `Skill\(\s*skill\s*=\s*...` so reformatting drift can't slip past
   the namespace guard.

Verification: 5854/5854 pass on `npm test` from the rebased branch.

* fix(#2855): drop pre-validation filter that hid namespace drift

CR finding on tests/bug-2808-skill-hyphen-name.test.cjs:128: the test
collected generated skill directories with
`.filter(entry => entry.isDirectory() && entry.name.startsWith('gsd-'))`,
then validated namespace invariants over that filtered list. Anything
that violated the prefix invariant — `gsd:extract-learnings` (colon
form), `extract_learnings` without prefix, `Gsd-foo` mis-cased — would
silently disappear from the iteration and the test would falsely pass.

Drop the `startsWith('gsd-')` filter so every generated directory shows
up. Add explicit assertions before the existing per-skill loop:
  - directory list is non-empty (catches a broken converter that
    produces nothing)
  - every directory begins with `gsd-`
  - every directory contains no `:`
  - every directory contains no `_`

Re-audited the full PR diff for the same anti-pattern: only this one
site filtered before validating the namespace; bug-2643 and
commands-doc-parity also use `readdirSync().filter()` but only by file
extension, which is correct.

5854/5854 on `npm test`.

* fix(#2855): address remaining CR findings (1 active + 2 nitpicks)

Three findings on PR #2858, all the same root cause: input narrowing
before validation lets drift slip past the guards.

1. tests/bug-2808-...:104 (active) — `colonCallRe` captured local names
   with `[a-z0-9-]+`, which excluded the underscore. A drift like
   `Skill(skill="gsd:extract_learnings")` (deprecated colon syntax with
   the old underscore filename) silently slid through. Broadened the
   capture to `[^'"\s)]+` so any malformed local name is surfaced; surrounding pattern (whitespace tolerance, escape support, flags)
   unchanged.

2. tests/bug-2643-...:43 (nitpick) — `extractSkillNamesHyphen` and
   `extractSkillNamesColon` had the same over-strict capture plus
   relied on a single regex over raw bytes, which the project test-
   rigor memory bans (`feedback_no_source_grep_tests.md`). Replaced
   with `extractSkillCalls(content)` — a small structural extractor
   that walks `Skill(` openers, locates each call's matching `)`,
   parses the body's `skill = "..."` keyword argument with permissive
   whitespace + quoting + escape handling, and returns
   `{ name, raw }` records. The two namespace-form helpers become
   thin filters over the structured output. Tightened the body class
   to `[^'"\\]+` so a trailing escape `\` before the closing quote
   (as in `Skill(skill=\"gsd-foo\", …)` written inside another string
   context) doesn't get included in the captured name.

3. tests/bug-2543-...:44 (nitpick) — `DOC_SEARCH_FILES` was a hand-
   curated 7-entry array. Every doc added in the future would silently
   weaken drift detection until someone remembered to extend the list.
   Replaced with `discoverDocSearchFiles(ROOT)`: globs every `.md`
   under `docs/` and adds `README.md` if present. New docs are picked
   up automatically.

Re-audited the diff surface for similar narrowings; no other sites
filter or constrain before validating namespace invariants.

5854/5854 on `npm test`.

* fix(#2855): recurse docs/ tree so localized translations are scanned too

CR finding: discoverDocSearchFiles() stopped at docs/*.md, leaving
localized translation trees (docs/ja-JP/, docs/zh-CN/, docs/ko-KR/,
docs/pt-BR/) and other nested doc collections (docs/skills/,
docs/superpowers/) invisible to the namespace-drift invariant.

Verified the gap: docs/ has 6 nested directories with ~30 .md files
that the previous top-level-only scan was skipping. None contain
/gsd: references today, but a future translation update or new
doc subdir could leak drift.

Switch to an iterative stack walk so every .md under docs/ is scanned
regardless of depth. Stack form (rather than recursion) avoids the
risk of running into the call-stack limit on deep doc trees.

5854/5854 on `npm test`.

---------

Co-authored-by: Tom Boucher <trekkie@nomorestars.com>

CHANGELOG.md

@@ -51,6 +51,7 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   (#2789)
 
 ### Fixed
+- **GSD slash command namespace drift cleaned up across docs, workflows, and autocomplete** — remaining active `/gsd:<cmd>` references now use canonical `/gsd-<cmd>`, escaped workflow `Skill(skill=\"gsd:...\")` prompts now use hyphenated skill names, `scripts/fix-slash-commands.cjs` rewrites retired colon syntax to hyphen syntax, and the extract-learnings command file now uses `extract-learnings.md` so generated Claude/Qwen skill autocomplete exposes `gsd-extract-learnings` instead of `gsd-extract_learnings`. (#2855)
 - **`extractCurrentMilestone` no longer truncates ROADMAP.md at heading-like lines inside fenced code blocks** — the milestone-end search now scans line-by-line while tracking ` ``` ` / `~~~` fence state, so a line like `# Ops runbook (v1.0 compat)` inside a code block no longer acts as a milestone boundary. Previously, any phase defined after such a block was invisible to `roadmap analyze`, `roadmap get-phase`, `/gsd-autonomous`, and all phase-number commands. (#2787)
 - **Codex install no longer corrupts existing `~/.codex/config.toml`** — the installer
   now defensively strips legacy `[agents]` (single-bracket) and `[[agents]]` (sequence)