… + behavior parity

What ships
----------
Built-in skills (15 SKILL.md files in packages/core/skills/)
- init / verify / run / code-review / security-review / skill-creator
- consolidate-memory / fewer-permission-prompts / update-config / keybindings-help
- deepseek-api / loop / schedule / review / pdf
Each has frontmatter (name + description) and a short body. The CLI auto-locates
this dir via `@deepcode/core/package.json` resolution and passes it to loadSkills
as the `builtinDir`. The 15 are baseline stubs — content can grow over time.

Effort benchmark (packages/core/scripts/effort-bench.ts)
- 3 scenarios × 5 effort tiers = 15 real API calls
- Reads creds from DEEPSEEK_API_KEY env OR ~/.deepcode/credentials.json
- Writes docs/design/effort-levels-measured.csv next to the design doc
- Computes ¥ cost using DeepSeek pricing from docs/design/effort-levels.md §2.4
- Run: pnpm -F @deepcode/core tsx scripts/effort-bench.ts

Release pipeline (.github/workflows/release.yml)
- Triggered on git tag v*
- validate job: typecheck + test + build on Ubuntu Node 22
- publish-cli: npm publish, with --tag <channel> for beta/nightly
- build-mac: stubbed (if: false) until M6 ships Electron app — has the full
  electron-builder + Apple notarization + artifact upload structure ready
- github-release: auto release notes from `git log`, prerelease flag for non-stable
- Channel/version/mandatory derived from tag: vX.Y.Z (stable), vX.Y.Z-beta.N,
  vX.Y.Z-nightly.N, vX.Y.Z+security.N

BEHAVIOR_PARITY.md (docs/)
- Per-feature comparison table vs Claude Code: 30+ slash commands, hook events,
  hook handler types, modes, memory system, MCP, tools, CLI flags
- Each row marked ✅ matches / 🟡 caveats / 🔄 deferred / ⚠️ deliberately differs / 🆕 DeepCode-only

REPL plumbing (apps/cli/src/repl.ts)
- New `resolveBuiltinSkillsDir()` helper finds packaged skills/ via
  @deepcode/core/package.json + dirname; loaded into skills registry alongside
  user/project/plugin layers

Package manifest
- packages/core/package.json `files` now includes "skills/" so npm install
  bundles the built-in skills

Verified
--------
  pnpm typecheck   → green
  pnpm test        → 308 passed / 8 skipped / 0 failed (unchanged — skills are content)
  pnpm format:check → conformant

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