meta(tasks): pause [active-platform-eval] after design + pre-flight

Combined the two backlog tasks [active-platform-tuning] +
[active-platform-eval] into a single workstream. Eval IS the tuning
mechanism; "wait for 5 real signals" was a placeholder replaced by
a 20-query synthetic eval set balanced across Win/Lin/Mac.

Spec written at .wiki/concepts/active-platform-eval-design.md
(~150 lines): 20 queries (>=3 should-trigger per OS + near-miss
negatives), run_loop.py 5-iter autoloop in parallel with manual
body sweep (WSL clarity, BSD/macOS expansion, ambiguity policy).
Workspace at .tasks/active-platform-eval/ (eval-set.json committed,
iterations gitignored). Version bump 1.0.0 -> 1.1.0 planned (MINOR).

Pre-flight verified: claude CLI on PATH at C:\nvm4w\nodejs\claude.ps1
(Claude Code 2.1.128); run_loop.py present in skill-creator install.
Both autoloop deps satisfied -- no fallback to manual single-pass.

Per-task file at .tasks/active-platform-eval.md (Goal, Key files,
Decisions log, Open questions, Notes). STATUS.md collapsed the two
original blocks into one paused block; resume point is Q2
(write 20 queries solo vs run skill-creator HTML-review template).

Also fixed in same pause: [install-ps1] STATUS scope expanded to
paired install.sh + install.ps1, cross-platform parity, prune flag
(lesson from [compress-dedup]).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.tasks/active-platform-eval.md

@@ -0,0 +1,49 @@
+# active-platform-eval
+
+## Goal
+Tune `active-platform` (description + body) using skill-creator's `run_loop.py` for description optimization in parallel with a manual body sweep. Replaces the placeholder "5 real signals" approach with a 20-query synthetic eval set balanced across Windows / Linux / macOS. Absorbs the two ⚪ tasks `[active-platform-tuning]` + `[active-platform-eval]` into one workstream — they were inseparable in practice (eval *is* the tuning mechanism). Bumps `version: 1.0.0 → 1.1.0` (MINOR — improved triggering + expanded body coverage; behavior compatible).
+
+## Key files
+- `skills/active-platform/SKILL.md` — frontmatter description (run_loop output) + body (manual sweep) + version bump
+- `dist/active-platform.skill` — rebuild after edits
+- `~/.claude/skills/active-platform/` — reinstall
+- `.tasks/active-platform-eval/eval-set.json` — 20-query trigger eval set, committed before kickoff
+- `.tasks/active-platform-eval/iteration-N/` — workspace for run_loop iterations (gitignored; transient)
+- `.tasks/active-platform-eval/.gitignore` — scopes the iteration subdirs out of git
+- `.wiki/concepts/active-platform-eval-design.md` — design doc (this task's spec; already written)
+- `.wiki/concepts/active-platform-eval.md` — final report (eval set summary, before/after scores, body diff summary)
+- `.wiki/concepts/active-platform-decision.md` — open-questions list (WSL, macOS coverage) is exactly what this eval resolves; cross-link
+- `.wiki/index.md` — add new concept entry
+- `.wiki/log.md` — append decision line
+- `.tasks/STATUS.md` — collapse `[active-platform-tuning]` + `[active-platform-eval]` ⚪ blocks into one 🔴 active block, then 🟢 done
+
+## Decisions log
+- 2026-05-05: combined the two backlog tasks into one. The split was an artefact of the original "wait for production misfires" model; synthetic eval covers the same ground in one pass with controlled cross-platform balance.
+- 2026-05-05: chose autoloop (`run_loop.py` × 5 iterations) **in parallel with** manual body sweep, per user explicit request ("давай одновременно"). The two halves don't conflict — autoloop only mutates frontmatter description; body sweep only mutates body.
+- 2026-05-05: model for run_loop = `claude-opus-4-7` (current session model — triggering test must match what the user actually experiences in production).
+- 2026-05-05: workspace at `.tasks/active-platform-eval/` (project-internal, not `~/AppData/Local/Temp/...`) so the eval set lives in git and the workflow is reproducible from any clone. Iteration subdirs gitignored — transient HTML reports + per-iteration outputs would balloon the repo.
+- 2026-05-05: eval set composition forced cross-platform balance: ≥3 should-trigger queries per OS (Win/Lin/Mac), rest implicit-shell-context. ≥10 should-not-trigger queries are deliberately near-misses (library API questions, README meta-questions, architecture talk) — only 1 genuinely-unrelated negative as a sanity baseline. Per-question-override cases marked `should_trigger: true` (the skill *should* fire, but body handles no-session-flip behavior, which the eval can't measure directly).
+- 2026-05-05: spec lives at `.wiki/concepts/active-platform-eval-design.md` per project-discipline Rule 1 (overrides skill-creator's default `docs/superpowers/specs/`). Final report goes to a sibling `active-platform-eval.md` (separate "what we're going to do" vs "what we did").
+- 2026-05-05: version bump 1.0.0 → 1.1.0 (MINOR) — added capability (better triggering, broader body coverage), no removed coverage, behavior compatible. Recorded in commit message per Rule 3.
+- 2026-05-05: install-ps1 task scope expanded in the same session (paired install.sh + install.ps1, cross-platform parity, --prune flag) — out of scope here, but logged in STATUS.md so we don't lose the requirement when this task closes.
+
+## Open questions
+- [ ] Does the `claude` CLI exist on PATH? `run_loop.py` shells out to `claude -p` for triggering tests. If not on PATH → fall back to manual single-pass description rewrite (still useful, but loses the train/test optimization).
+- [ ] How does `run_loop.py` behave on Windows? skill-creator's docs assume bash-like shell for the invocation; may need to invoke through git-bash or adjust working-directory handling.
+- [ ] Per-question override eval cases — confirmed `should_trigger: true` (skill fires) but the no-session-flip behavior is body-driven, not measurable by trigger eval. Document in `.wiki/concepts/active-platform-eval.md` final report so future readers know the eval didn't directly measure that.
+
+## Completed steps
+- [x] 2026-05-05: read current `active-platform/SKILL.md` (lines 1-86) and `active-platform-decision.md` (lines 1-46) to baseline scope and known weak spots (WSL, macOS coverage, trigger phrase comprehensiveness).
+- [x] 2026-05-05: invoked `superpowers:brainstorming` skill, walked through the design choices (combine vs split, autoloop vs manual, parallel vs sequential), reached approval on combined-and-parallel plan.
+- [x] 2026-05-05: wrote design doc `.wiki/concepts/active-platform-eval-design.md` (per project-discipline Rule 1).
+- [x] 2026-05-05: pre-flight verified — `claude` CLI on PATH (`C:\nvm4w\nodejs\claude.ps1`, Claude Code 2.1.128); `run_loop.py` present at `~/.claude/plugins/cache/claude-plugins-official/skill-creator/unknown/skills/skill-creator/scripts/run_loop.py`. Both autoloop dependencies satisfied; no fallback to manual single-pass needed.
+- [x] 2026-05-05: STATUS.md collapsed the two original ⚪ tasks (`[active-platform-tuning]` + `[active-platform-eval]`) into one block, set 🔴 active during design phase, then 🟡 paused at user request before eval-set authorship.
+- [x] 2026-05-05: paused at user request — task complete through design + tooling pre-flight; resume point is Q2 (write eval set solo vs HTML-review).
+- (further steps appended during implementation when resumed)
+
+## Notes
+- Skill-creator path on this machine: `~/.claude/plugins/cache/claude-plugins-official/skill-creator/unknown/skills/skill-creator/`. `run_loop.py` lives under that at `scripts/run_loop.py`.
+- Snapshot the current skill before kickoff: `cp -r skills/active-platform .tasks/active-platform-eval/skill-snapshot/` so the run_loop's "old description" baseline matches what we're tuning *from*, regardless of any edits I make to the body during the parallel sweep.
+- run_loop accepts `--max-iterations N`. Plan = 5 (skill-creator default + sufficient signal for a single description field).
+- run_loop output: `best_description` selected by held-out test score, not train score (skill-creator's anti-overfit choice). Trust the test-score winner unless qualitative review of the score table reveals an obvious flaw.
+- After this task: `[install-ps1]` (already updated in STATUS.md to require paired install.sh + install.ps1 + `--prune`), then revisit any further skill backlog items.