docs: live-R2 dogfood — compact + snapshot bootstrap PASS (spec/19 §F)

[Reederey87]

Records the 2026-07-04 live-R2 dogfood — the first live exercise of the snapshot-exchange wave (hub compact + fresh-device snapshot bootstrap, P4-SYNC-02/P4-HUB-11) against the real Cloudflare R2 bucket.

Result: PASS. Three simulated devices; the fingerprint-confirmed one-paste pairing ceremony; hub compact deleted 7 cold events and published a sealed snapshot (event log bounded); a fresh device C (cursor 0, below the retention floor) printed "Recovering from hub snapshot…", imported the snapshot, and materialized 6/6 projects despite the deleted cold events. Incumbents synced with no false recovery; hub gc clean; doctor --remote 24 ok / 0 errors.

New spec/19 §F "Live-R2 dogfood validation log" + a spec/18 work-log entry closing the "live two-machine R2 dogfood (wave close-out)" follow-up. Docs-only; spec-drift passes.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Added a new live validation log entry with a dated pass report.
  • Expanded the cloud provisioning guide with step-by-step notes for running multi-device validation against a live R2 bucket.
  • Documented observed behavior for compaction, snapshot publication, device recovery, sync after compaction, and health checks.
  • Clarified setup details and a key migration step needed before first sync on each device.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: b84260b1-89b3-4c07-afd7-b5dd19c3677e

📥 Commits

Reviewing files that changed from the base of the PR and between 3e54bc0 and 03d77c2.

📒 Files selected for processing (2)

• spec/18_WORK_LOG.md
• spec/19_CLOUD_PROVISIONING_GUIDE.md

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📝 Walkthrough

Walkthrough

Adds documentation-only entries: a new work-log entry describing a 2026-07-04 live R2 dogfood validation run, and a corresponding new section in the cloud provisioning guide detailing the compact-plus-snapshot-bootstrap procedure and observed outcomes.

Changes

Dogfood validation documentation

Layer / File(s)	Summary
Work log entry for dogfood run spec/18_WORK_LOG.md	Adds a newest-first entry documenting the 2026-07-04 live-R2 dogfood validation covering hub compaction and fresh-device snapshot bootstrap, including observed outcomes and follow-ups.
Provisioning guide validation log section spec/19_CLOUD_PROVISIONING_GUIDE.md	Adds a new "Live-R2 dogfood validation log" section with a detailed PASS record covering multi-device setup, compact dry-run vs real execution, fresh-device recovery, and doctor/GC results.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• Reederey87/DevStrap#77: Both PRs modify the same work-log entry in spec/18_WORK_LOG.md for the 2026-07-04 snapshot-exchange wave, including the live-R2 dogfood validation details.
• Reederey87/DevStrap#58: Both PRs modify spec/19_CLOUD_PROVISIONING_GUIDE.md and spec/18_WORK_LOG.md with related pairing/rotation and dogfood validation content.
• Reederey87/DevStrap#64: Both PRs add related sync/compaction and snapshot validation entries to spec/18_WORK_LOG.md.

Suggested labels: documentation

Suggested reviewers: Reederey87

🐰 A dogfood ran through the R2 mist,
Compaction sealed the events that missed,
A fresh device woke to snapshot's grace,
Cold logs gone without a trace,
The spec now holds this quiet twist.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately highlights the main docs-only live-R2 compact and snapshot-bootstrap validation.
Description check	✅ Passed	The description includes the required Summary, Tests, and Safety Checklist sections and provides detailed change context.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/dogfood-run4-notes

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