fix: per-entity Step 0.55, LAW 7 sub-run quiet, default 2, canonical SKILL.md (#311)

Four fixes based on 2026-04-22 test-window feedback on v3.0.11 --competitors:

- Each competitor sub-run now runs Step 0.55 (X handle / subreddits /
  GitHub) via resolve.auto_resolve inside the fanout closure. Deep-copied
  config per entity prevents _auto_resolve_context leak across sub-runs.
  Resolved data stored on report.artifacts["resolved"] for the renderer.
- New internal_subrun keyword on planner.plan_query and pipeline.run
  suppresses the LAW 7 "No --plan passed" stderr for engine-internal
  fan-out only. Default path unchanged.
- Default --competitors count is now 2 (3-way total). --competitors=N
  still customizes; range 1..6.
- SKILL.md STEP 0 canonical-path self-check forces readers who loaded
  from marketplaces/ (auto-restored to origin/main, stale) to re-read
  from plugins/cache/last30days-skill/last30days/{VERSION}/SKILL.md.
  Two of three 2026-04-22 test windows hit this stale-path trap.
- New ## Resolved Entities block in render_comparison_multi shows
  per-entity handles/subs/github for debug visibility.

Bumps plugin.json to 3.0.12. 12 new tests; 1,175 total passing.

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.0.12] - 2026-04-22
+
+### Fixed
+
+- **Per-entity Step 0.55 resolution for competitor sub-runs.** In 3.0.11, only the main topic got X handle / subreddit / GitHub resolution; competitor sub-runs ran with planner defaults and produced visibly thinner evidence (Reddit 403 fallbacks, single-word queries). Each competitor sub-run now calls `resolve.auto_resolve()` inside `fanout.run_competitor_fanout` when a web backend is available, mirroring the main topic's pre-flight resolution. Per-entity X handle, subreddit list, GitHub user/repos, and news context are threaded into each sub-run's `pipeline.run()` call. Deep-copied config per sub-run prevents `_auto_resolve_context` cross-leak. Surfaces in a new `## Resolved Entities` output block so the resolution coverage is visible without reading stderr.
+- **LAW 7 false-positive on internal fan-out sub-runs.** Each competitor sub-run was emitting the `[Planner] No --plan passed... YOU ARE the planner` stderr warning. LAW 7 targets the hosting-reasoning-model path, not engine-internal fan-out. New `internal_subrun=True` keyword on `planner.plan_query` and `pipeline.run` suppresses the warning for sub-runs only; the default path is unchanged.
+- **Marketplace-stale SKILL.md trap.** Added a STEP 0 canonical-path self-check at the top of SKILL.md. Two of three 2026-04-22 test runs loaded SKILL.md from `plugins/marketplaces/last30days-skill/` (Claude-Code-managed git clone pinned to origin/main, lagging the versioned cache), then ran `--help` against the same stale path, did not see `--competitors`, and fell back to a manual comparison plan. The STEP 0 block forces any reader to verify they loaded from `plugins/cache/last30days-skill/last30days/{VERSION}/SKILL.md` and re-read from the versioned cache if not.
+
+### Changed
+
+- **Default `--competitors` count is now 2 (3-way total: original + 2 peers).** Previously 3. `--competitors=N` still customizes (range 1..6). Matches the feature description's canonical example (`Kanye vs Drake vs Kendrick`).
+
+### Added
+
+- **`## Resolved Entities` block** in `render_comparison_multi` output. Shows per-entity X handle, subreddits, GitHub user/repos, and truncated context for every entity in the comparison. Block is omitted entirely when no entity has a resolved payload (mock mode, no backend).
+
 ## [3.0.11] - 2026-04-22
 
 ### Added