Slot holographic slicing feature issues into roadmap

[flyingrobots]

Summary

• Splits PROTO-0271 implementation work into child GitHub Issues PROTO-0271A - Materialization boundary guard #628-PROTO-0271H - Holographic CLI/operator witness playback #635.
• Closes parent design issue PROTO-0271 - Holographic slicing and streaming checkpoint basis #626 as completed after design landing.
• Slots the child issues into the v18.0.0 roadmap gate.
• Updates roadmap counts from 409 to 416 open indexed issues.
• Marks the PROTO-0271 design doc as landed and records the child issue disposition.

Refs #628 #629 #630 #631 #632 #633 #634 #635.
Closes #626.

Validation

• npx markdownlint docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md
• npm run lint:md:code -- docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md
• npm exec vitest run test/unit/scripts/release-policy-shape.test.ts
• git diff --check -- docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md
• Roadmap reconciliation script: 416 rows, indexed/pulled/assigned all 416, PROTO-0271A - Materialization boundary guard #628-PROTO-0271H - Holographic CLI/operator witness playback #635 each present once, PROTO-0271 - Holographic slicing and streaming checkpoint basis #626 absent from open roadmap.
• Pre-push IRONCLAD M9: static gates passed and test:local passed 537 files / 7117 tests.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 6b761648-9681-42c3-b199-b946c7cd10a5

📥 Commits

Reviewing files that changed from the base of the PR and between c1586cb and 18ca819.

📒 Files selected for processing (2)

• docs/ROADMAP.md
• docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch slot-holographic-features-roadmap

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[github-actions]

Release Preflight

• package version: 18.0.0
• prerelease: false
• npm dist-tag on release: latest
• npm pack dry-run: passed
• jsr publish dry-run: passed

If you tag this commit as v18.0.0, release workflow will publish.

[flyingrobots]

@codex Code Lawyer activity summary for PR #636.

Source	Severity	File	Lines	Finding	Outcome
Self-review	-	-	-	No diff findings after reviewing git diff origin/main...HEAD.	No RED/GREEN fix commit required.
PR threads	-	-	-	No unresolved inline review threads returned by GraphQL.	Nothing to resolve.

Validation evidence:

Check	Result
git status --porcelain	Clean
git fetch origin	Completed
npx markdownlint docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md	Passed
npm run lint:md:code -- docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md	Passed
npm exec vitest run test/unit/scripts/release-policy-shape.test.ts	Passed, 8 tests
Roadmap reconciliation script	416 rows, 416 indexed, 416 pulled, 416 assigned, largest slot 50, zero over-limit slots, zero unassigned gap
git diff --check -- docs/ROADMAP.md docs/design/0271-v18-holographic-slicing-checkpoint-basis/v18-holographic-slicing-checkpoint-basis.md	Passed
npm run lint	Passed when run sequentially
npm run typecheck	Passed when run sequentially
npm run test:local	Passed, 537 files / 7117 tests
gh pr checks 636	All checks pass

Merge gate judgment:

Gate	State
CI green	Pass
Unresolved review threads	Pass, 0 threads
Changes Requested reviews	Pass, 0
Approvals	Locked, 0 approvals
CodeRabbit cooldown	Locked, CodeRabbit left a rate-limit comment even though the status context is green

Non-PR observation: running npm run lint or npm run typecheck concurrently with npm run test:local can race with test/unit/scripts/type-import-hygiene-shape.test.ts, which writes temporary fixture files under src/domain. Sequential gate commands pass, and this branch does not touch that test, so I did not classify it as a PR finding.