chore: remove BOOTSTRAP.md, slim CLAUDE.md

BOOTSTRAP.md is superseded by the disinto-factory skill (SKILL.md).
CLAUDE.md now just points to AGENTS.md and the skill.
Updated AGENTS.md reference accordingly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -2,19 +2,5 @@
 
 This repo is **disinto** — an autonomous code factory.
 
-For setup and operations, load the `disinto-factory` skill from `disinto-factory/SKILL.md`.
-
-Quick references:
-- `AGENTS.md` — per-agent architecture and file-level docs
-- `VISION.md` — project philosophy
-- `BOOTSTRAP.md` — detailed init walkthrough
-- `disinto-factory/references/troubleshooting.md` — common issues and fixes
-- `disinto-factory/scripts/factory-status.sh` — quick status check
-
-## Code conventions
-
-- Bash for checks, AI for judgment
-- Zero LLM tokens when idle (cron polls are pure bash)
-- Fire-and-forget mirror pushes (never block the pipeline)
-- Issues are the unit of work; PRs are the delivery mechanism
-- See `AGENTS.md` for per-file watermarks and coding conventions
+Read `AGENTS.md` for architecture, coding conventions, and per-file documentation.
+For setup and operations, load the `disinto-factory` skill (`disinto-factory/SKILL.md`).