Update CHANGELOG with all v0.1 features

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

Author: unknown

CHANGELOG.md

@@ -8,9 +8,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- Initial CLI with `thinktank run` and `thinktank list` commands
-- Parallel Claude Code agent execution in isolated git worktrees
-- Convergence analysis grouping agents by file-change fingerprint
-- Recommendation scoring based on test results + convergence + diff size
-- CI pipeline with GitHub Actions (Node 22/24)
+- `thinktank run` command — spawn N parallel Claude Code agents in isolated worktrees
+- `thinktank apply` command — apply recommended or selected agent's changes
+- `thinktank list` command — view last run's results
+- Convergence analysis with diff-content comparison (Jaccard similarity + union-find clustering)
+- Unified diff parser for structured change extraction
+- Recommendation scoring: test results > convergence > diff size
+- Test runner with command parsing, error detection (ENOENT, timeout), and pre-flight checks
+- CI pipeline with GitHub Actions (Node 22/24, build, lint, typecheck, test)
 - CodeQL security scanning
+- Biome for TypeScript linting and formatting
+- 31 unit tests across convergence, diff parsing, test runner, and apply command
+- YAML-based issue templates (bug report, feature request)
+- PR template, CONTRIBUTING.md, SECURITY.md, CODE_OF_CONDUCT.md
+- CLAUDE.md with project architecture and conventions
+- VS Code configuration with Biome formatter