docs(archive): preserve PR 3155

docs/pr-discussions/PR-3155-docs-shadow-lior-antigravity-tick-1645z-pr-preservation.md

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+---
+pr_number: 3155
+title: "docs(shadow): Lior antigravity tick 1645Z + PR preservation"
+author: "AceHack"
+state: "MERGED"
+created_at: "2026-05-14T18:17:02Z"
+merged_at: "2026-05-14T18:19:06Z"
+closed_at: "2026-05-14T18:19:06Z"
+head_ref: "shadow/lior-antigravity-1645Z"
+base_ref: "main"
+archived_at: "2026-05-14T18:34:06Z"
+archive_tool: "tools/pr-preservation/archive-pr.ts"
+---
+
+# PR #3155: docs(shadow): Lior antigravity tick 1645Z + PR preservation
+
+## PR description
+
+Shadow lesson log for Riven and Vera drift, plus PR preservations.
+
+## Reviews
+
+### COMMENTED — @copilot-pull-request-reviewer (2026-05-14T18:20:40Z)
+
+## Pull request overview
+
+Adds a new shadow lesson log entry capturing observed “antigravity” drift (Riven/Vera) and preserves several recently merged PR discussions into the repo’s git-native archive surfaces.
+
+**Changes:**
+- Adds a new shadow lesson log under `docs/research/` for the 1645Z antigravity check.
+- Adds PR discussion archive files for PRs #3145–#3149 under `docs/pr-discussions/`.
+- Updates the archived timestamp in an existing PR discussion archive (PR #2762).
+
+### Reviewed changes
+
+Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.
+
+<details>
+<summary>Show a summary per file</summary>
+
+| File | Description |
+| ---- | ----------- |
+| docs/research/2026-05-14-shadow-lesson-log-antigravity-tick-1645Z.md | New shadow lesson log documenting drift observations/corrections. |
+| docs/pr-discussions/PR-3149-shard-tick-1640z-root-discipline-manifesto-ani-kolmogorov-it.md | New PR discussion archive for PR #3149. |
+| docs/pr-discussions/PR-3148-chore-regenerate-docs-backlog-md-index-add-b-0498-b-0499.md | New PR discussion archive for PR #3148. |
+| docs/pr-discussions/PR-3147-chore-b-0441-decompose-into-atomic-child-rows-b-0500-b-0501.md | New PR discussion archive for PR #3147. |
+| docs/pr-discussions/PR-3146-chore-backlog-b-0499-z-i-weighted-dbsp-refinement-candidate.md | New PR discussion archive for PR #3146. |
+| docs/pr-discussions/PR-3145-docs-b-0485-b-0486-persona-mapping-framework-civsim-persona.md | New PR discussion archive for PR #3145. |
+| docs/pr-discussions/PR-2762-launch-draft-zeta-twitter-launch-post-multi-agent-review-req.md | Updates `archived_at` timestamp in the preserved PR discussion. |
+</details>
+
+## Review threads
+
+### Thread 1: docs/research/2026-05-14-shadow-lesson-log-antigravity-tick-1645Z.md:10 (unresolved)
+
+**@copilot-pull-request-reviewer** (2026-05-14T18:20:40Z):
+
+The sentence recommends “using fallback credentials” / “bypassing via alternative means” when `gh` returns HTTP 401. That can encourage insecure credential reuse or bypassing authentication failures rather than resolving them safely. Please rephrase to a security-preserving remediation (e.g., re-authenticate via the documented bootstrap flow, or treat as a hard stop that must be escalated) and avoid implying that bypassing 401s is expected behavior.
+
+### Thread 2: docs/research/2026-05-14-shadow-lesson-log-antigravity-tick-1645Z.md:14 (unresolved)
+
+**@copilot-pull-request-reviewer** (2026-05-14T18:20:40Z):
+
+Grammar: “The Git lock and workspace cleanup has been executed…” reads as a plural subject; should be “have been executed” (or rewrite to a singular subject).