docs: de-superpowers per-skill READMEs + drop stale trigger from CLAUDE.md

F4 (de-superpowers-skill-readmes): 3 READMEs cleaned — bootstrap L47 no
longer claims 'use superpowers' template line; discipline L13 without
docs/superpowers/ paths + stale Rule 4 ('Commit yes, push no' grant model)
replaced with 'Push freely by default' (same class as review F2);
recommend-dont-menu L7 without superpowers:brainstorming. dist rebuilt for
all three (build.ps1 -Names), lint 39/0.

F5 (skills-live-claudemd-superpowers-trigger): root CLAUDE.md dropped
'use superpowers' (stale — plugin not installed); remaining 12 triggers
verified against installed skills.

skills/project-bootstrap/README.md

@@ -44,7 +44,7 @@ projects bootstrapped at different times debuggable.
 | `README.md` | minimal stub | Skipped if file exists. |
 | `.wiki/` | delegated to `setup-wiki` | Karpathy LLM Wiki layout — `CLAUDE.md`, `index.md`, `log.md`, `overview.md`, `raw/`, `entities/`, `concepts/`, `packages/`, `sources/`. |
 | `.tasks/` | delegated to `setup-tasks` | Canonical board — `STATUS.md` plus per-task `<task-slug>.md` files. |
-| `CLAUDE.md` | `assets/CLAUDE.md.template` | Skill triggers (`use superpowers`, `use project wiki`, etc.). On non-Windows hosts, swap the `we're on Windows` line for `we're on Linux` / `we're on macOS`. On upgrade, the template is treated as a canonical set and merged idempotently — only missing trigger lines are appended after user confirm. Re-runs are no-ops. |
+| `CLAUDE.md` | `assets/CLAUDE.md.template` | Skill triggers (`use project wiki`, `use task management system`, etc.). On non-Windows hosts, swap the `we're on Windows` line for `we're on Linux` / `we're on macOS`. On upgrade, the template is treated as a canonical set and merged idempotently — only missing trigger lines are appended after user confirm. Re-runs are no-ops. |
 | `.wiki/concepts/bootstrap-manifest.md` | generated | Records which skill versions initialized the project, so cross-project layout drift is debuggable. |
 
 ## Workflow