Conciseness

Lean and efficient throughout: no concept explanations, no padding — every line is a directive, command, or a constraint like "Do not implement CargoKit behavior only in copied FRB example output" and "Keep the branch alive until the FRB PR has passed CI". Matches the 5 anchor; there is no over-explanation to trim, so 4 does not fit.

Actionability

Fully executable guidance: git submodule update --init --recursive, per-path git -C fetch/checkout for both submodules, git add for both pointer paths, git diff --submodule, ./frb_internal precommit-integrate, and ./frb_internal lint --fix. The <branch-or-ref> placeholders are justified flexibility, not pseudocode; not 4 because commands cover the common cases including verification.

Workflow Clarity

Clear 4-phase sequence with explicit validation checkpoints ("Confirm the outer FRB diff shows submodule pointer changes for both paths", "Wait for the FRB PR CI to pass with the temporary CargoKit pointer") and a CI Failure Triage section that routes failures to the correct fix — a genuine validate/classify/retry feedback loop. Matches the 5 anchor; the destructive/batch cap of 3 does not apply since validation steps are present.

Progressive Disclosure

Well-organized single-file structure (Overview, Source Locations, Workflow, CI Failure Triage, Related Skills) with clear section navigation and no bundle files, so nothing is misplaced. Not 5 because at ~130 lines of workflow detail nothing is split out into reference files (e.g., the CI triage routing), leaving minor organization headroom; not 3 because structure and signaling are clearly stronger than the 3 anchor.

Specificity

Names several concrete actions — "Develop or update CargoKit", "updating the FRB CargoKit submodule pointers", "preparing the paired CargoKit and FRB PRs that synchronize CargoKit changes into FRB integrate templates and examples". Not 5 because the actions are workflow-level rather than comprehensively enumerated; not 3 because coverage clearly spans more than 1-2 actions.

Completeness

Explicitly answers both: what ("Develop or update CargoKit for flutter_rust_bridge") and when (three concrete "Use when..." clauses covering bug/feature ownership, submodule pointer updates, and paired PRs). Matches the 5 anchor exactly; the 4 anchor's weaker "when" does not apply.

Trigger Term Quality

Good keyword coverage including the synonym pair "flutter_rust_bridge"/"FRB", plus "fzyzcjy/Cargokit", "submodule pointers", and "PRs". Not 5 because a few natural phrases users might say (e.g., "integrate template", "rust_builder") appear only in the body; not 3 because coverage with synonyms is well beyond "some relevant keywords".

Distinctiveness Conflict Risk

Clear niche — CargoKit changes flowing into FRB submodule pointers and paired PRs — with distinct triggers like "a bug or feature belongs in fzyzcjy/Cargokit". Not 5 because a sibling frb-cargokit skill covering CargoKit ownership creates minor overlap risk on bare "CargoKit" mentions; not 3 because the triggers are far more distinct than the 3 anchor.