chore: release v2.1.6

[kky42]

Intent

Release PiFlow version 2.1.6 after merged PR #5 using the repository's established manual release path, without inventing release automation. Prepare the minimal version bump and accurate GitHub release notes covering profile-agnostic prompt consolidation, active-tool gating, corrected workflow claims, deterministic contract/scenario tests, and the opt-in bounded real-model routing E2E without claiming deterministic model behavior or cost improvements. Validate package contents, type checking, all tests, Node 22.x and 24.x support, version consistency, and dry-run packaging. Push only through a no-mistakes release PR and never merge it; stop at green checks for captain authorization. Publishing, then an annotated tag and GitHub Release, may occur only after explicit authorization for that exact merged release PR and re-verification of default branch and npm registry state; never weaken npm authentication, OTP, provenance, or other credential protections.

What Changed

• Bumped version to 2.1.6 in package.json and package-lock.json, packaging the fix from PR fix(prompts): consolidate routing guidance and correct runtime claims #5 (prompt consolidation, active-tool gating, corrected workflow claims, and deterministic contract/scenario tests).

Risk Assessment

✅ Low: The change is a three-location mechanical version bump with no logic, dependency, or configuration changes, fully consistent with the stated release process.

Testing

TypeScript compilation, the full local test suite (179 tests), and a dry-run pack all pass for @kky42/pi-flow@2.1.6. The release commit is exactly the minimal version bump the intent requires, with no other source changes.

Evidence: check + dry-run pack output

> @kky42/pi-flow@2.1.6 check
> tsc --noEmit && vitest run

 RUN  v3.2.4

 ✓ test/agent-rendering.test.ts (4 tests) 31ms
 ✓ test/pi-backend-behavior.test.ts (10 tests) 136ms
 ✓ test/agent-concurrency.test.ts (7 tests) 181ms
 ✓ test/agent-progress.test.ts (10 tests) 282ms
 ✓ test/e2e-basic-metrics.test.ts (8 tests) 5ms
 ✓ test/agent-contract.test.ts (8 tests) 509ms
 ✓ test/concurrency.test.ts (8 tests) 6ms
 ✓ test/stream.test.ts (5 tests) 2ms
 ✓ test/workflow.test.ts (63 tests) 900ms
 ✓ test/timeout.test.ts (1 test) 1ms
 ✓ test/profiles.test.ts (5 tests) 22ms
 ✓ test/headless.test.ts (11 tests) 135ms
 ✓ test/delegation-scenarios.test.ts (3 tests) 57ms
 ✓ test/workflow-integration.test.ts (13 tests) 1737ms
 ✓ test/e2e-deepseek-claude-env.test.ts (6 tests) 4105ms
 ✓ test/claude-backend.test.ts (6 tests) 6587ms
 ✓ test/codex-backend.test.ts (11 tests) 9797ms

 Test Files  17 passed (17)
      Tests  179 passed (179)
   Duration  12.28s

--- npm pack --dry-run ---
npm notice package: @kky42/pi-flow@2.1.6
npm notice version: 2.1.6
npm notice filename: kky42-pi-flow-2.1.6.tgz
npm notice package size: 315.9 kB
npm notice unpacked size: 747.5 kB
npm notice total files: 91
npm notice (prepack build: tsc -p tsconfig.dist.json + rewrite-dts-extensions, 17 .d.ts files rewritten)

Pipeline

Updates from git push no-mistakes

✅ **intent** - passed

✅ No issues found.

✅ **Rebase** - passed

✅ No issues found.

✅ **Review** - passed

✅ No issues found.

✅ **Test** - passed

✅ No issues found.

• npm run check — tsc --noEmit + vitest run (179 tests, 17 files)
• npm pack --dry-run — verified tarball is @kky42/pi-flow@2.1.6, 91 files, 315.9 kB, prepack dist build succeeds
• version consistency check: package.json and package-lock.json both read 2.1.6
• diff inspection: release commit touches only package.json and package-lock.json

✅ **Document** - passed

✅ No issues found.

✅ **Lint** - passed

✅ No issues found.

✅ **Push** - passed

✅ No issues found.

[kky42]

Superseded by the v2.1.6 release from main at 00f73b3, which includes the version bump together with the prompt and workflow guidance improvements.