Add Copilot review guidance for byte-locked carried fleet content

.github/copilot-instructions.md

@@ -2,11 +2,11 @@
 
 Repository conventions for GitHub Copilot (and any other AI agent reading this file).
 
-The **canonical guide is [AGENTS.md](../AGENTS.md)** at the repo root - read it first, including the [PR Review Etiquette](../AGENTS.md#pr-review-etiquette) review-loop contract this file's runbook implements. This file is intentionally narrow: commit/PR-title conventions (summarized inline so VS Code's commit-message and PR-title generators have them) plus the GitHub Copilot Review Runbook.
+The **canonical guide is [AGENTS.md](../AGENTS.md)** at the repo root - read it first, including the [PR Review Etiquette](../AGENTS.md#pr-review-etiquette) review-loop contract this file's runbook implements. This file is intentionally narrow: commit/PR-title conventions (summarized inline so VS Code's commit-message and PR-title generators have them), guidance for reviewing carried fleet content, plus the GitHub Copilot Review Runbook.
 
 For code-style rules, see [`CODESTYLE.md`](../CODESTYLE.md) at the repo root - one guide with a General section plus a section per language the repo uses.
 
-Do not duplicate language-specific rules here. **Project-specific conventions and API/behavioral contracts also belong in [AGENTS.md](../AGENTS.md), not here** - this file is intentionally limited to the inline commit/PR-title summary and the GitHub Copilot Review Runbook. Non-Copilot agents (Claude Code, Codex, Cursor, ...) are not directed to this file and don't read it by default, so any rule a reviewer must honor has to live in `AGENTS.md` to be provider-independent.
+Do not duplicate language-specific rules here. **Project-specific conventions and API/behavioral contracts also belong in [AGENTS.md](../AGENTS.md), not here** - this file is intentionally limited to the inline commit/PR-title summary, the guidance for reviewing carried fleet content, and the GitHub Copilot Review Runbook. Non-Copilot agents (Claude Code, Codex, Cursor, ...) are not directed to this file and don't read it by default, so any rule a reviewer must honor has to live in `AGENTS.md` to be provider-independent.
 
 ## Commit Messages and Pull Request Titles
 
@@ -16,6 +16,15 @@ Summarized for VS Code's generators; the full rules, rationale, and examples are
 - US English, title case with lowercase short bind words; no vague titles, no `Co-Authored-By:` unless asked, no release-bump magnitude (NBGV handles versioning). Dependabot's `Bump X from Y to Z` titles are fine.
 - develop PRs squash-merge (`gh pr merge --squash`), main PRs merge-commit (`--merge`); a mismatched flag is rejected by branch protection.
 
+## Reviewing Carried Fleet Content
+
+Several of this repository's governance files are carried from a shared template and are byte-identical across a fleet of sibling repositories: `AGENTS.md`, `CODESTYLE.md`, `WORKFLOW.md`, this file, and the `repo-config/` and `spec/` files. Most of `AGENTS.md` is universal fleet law - every section that states a rule, as opposed to the two that describe this repository's own directory tree and devcontainer, is byte-locked and verified by an automated byte-for-byte match against the template canonical, not by line-by-line review.
+
+Two constraints follow when reviewing that content.
+
+- **A reference inside byte-locked text to a path or section this repository does not carry is intentional, not a broken link.** Universal rule text names shared infrastructure - a fleet registry, a reusable config snippet, the other workflow model's ruleset payload - that a given repository legitimately may not contain. Editing the text to "fix" such a reference would break the fleet audit that governs it, so the reference is correct as written. Do not report it as a dead link, a missing file, or a broken cross-reference.
+- **A genuine substantive defect is still worth raising.** Byte-locked is not unreviewable. A self-contradiction, a factual error, or a real typo in the canonical prose is a valid finding - note that the fix lands at the template and re-vendors to every repository, rather than proposing a local edit the audit would reject.
+
 ## GitHub Copilot Review Runbook
 
 > This runbook implements the [AGENTS.md "PR Review Etiquette"](../AGENTS.md#pr-review-etiquette) review-loop contract for GitHub Copilot. Without it in-repo, an agent has no pointer to the reliable Copilot mechanics and falls back to known-broken paths (the no-op `POST /requested_reviewers`, the wrong bot-login filter). In the API snippets below, fill the `<owner>` / `<repo>` / `<N>` placeholders.
@@ -195,6 +204,7 @@ Reply-body conventions:
 - Accepted bug/style fix: include fixing commit SHA and a one-line summary.
 - Declined style comment: cite the rule (AGENTS.md or the CODESTYLE.md language section) and the existing-tree precedent.
 - Declined architecture proposal: one-sentence rationale.
+- Declined false positive on carried fleet content (a broken-link or dead-cross-reference flag inside byte-locked rule text): cite the "Reviewing Carried Fleet Content" section - the reference is intentional and the text cannot be edited locally.
 
 After the final push, sweep-resolve stale older threads for removed code paths.
 

spec/files.json

@@ -7,7 +7,7 @@
         { "path": "WORKFLOW.md", "fidelity": "intent", "whole": true, "intentRef": "WORKFLOW.md", "appliesTo": "*" },
         { "path": "README.md", "appliesTo": "*" },
         { "path": "HISTORY.md", "appliesTo": "*" },
-        { "path": ".github/copilot-instructions.md", "fidelity": "intent", "whole": true, "sections": ["Commit Messages and Pull Request Titles", "GitHub Copilot Review Runbook"], "placeholders": ["<owner>", "<repo>", "<N>"], "appliesTo": "*" },
+        { "path": ".github/copilot-instructions.md", "fidelity": "intent", "whole": true, "sections": ["Commit Messages and Pull Request Titles", "Reviewing Carried Fleet Content", "GitHub Copilot Review Runbook"], "placeholders": ["<owner>", "<repo>", "<N>"], "appliesTo": "*" },
         { "path": ".editorconfig", "fidelity": "intent", "whole": true, "intentRef": "AGENTS.md#line-endings", "appliesTo": "*" },
         { "path": ".editorconfig-checker.json", "fidelity": "intent", "whole": true, "intentRef": "AGENTS.md#line-endings", "appliesTo": "*" },
         { "path": ".gitattributes", "fidelity": "intent", "whole": true, "intentRef": "AGENTS.md#line-endings", "appliesTo": "*" },