Conciseness

The body is dense and operational throughout — no paragraphs explaining what a browser or dev server is, and every rule carries harness-specific policy rather than common knowledge. There are minor instances that could be trimmed: step 4's justification of why .env is trustworthy but prose mentions are not, step 6's extended question-tool negotiation logic, and the Modes section pre-summarizing what references/pipeline-orchestration.md then re-states. That places it at the efficient-with-minor-trimming anchor, not the every-token-earns-its-place anchor.

Actionability

Concrete, executable commands appear inline where they matter — `gh pr view [number] --json files -q '.files[].path'`, `git diff --name-only main...HEAD`, `scripts/resolve-port.sh`, `http://localhost:<port>` — and the referenced files (route-and-report.md, agent-browser-driver.md, pipeline-orchestration.md) carry complete copy-paste command blocks, which all exist in the bundle. Minor gaps remain in the body itself: steps 3 and 7 are directive summaries whose executable detail lives entirely in the references, and element-interaction specifics depend on the driver's own docs, so it sits at 'mostly executable with minor gaps' rather than fully copy-paste-ready.

Workflow Clarity

A 10-step sequence with explicit validation checkpoints at the fragile points: verify the dev server is running before spending the headed/headless question (step 5), verify the root is served before iterating routes (step 6), and per-page check lists in the reference. Error recovery is a genuine feedback loop (capture error state + exact repro, then fix-and-re-run the failing test), with distinct, well-defined unattended behavior for pipeline mode (log Skip with reason, continue). This matches the anchor requiring explicit validation steps plus feedback loops for error recovery.

Progressive Disclosure

The body is a clear overview with three one-level-deep reference files and one script, all of which exist in the bundle, each explicitly signaled with its read condition (route-and-report.md before step 3, agent-browser-driver.md before running any command, pipeline-orchestration.md only in pipeline mode). No reference chains into another referenced file — agent-browser-driver.md delegates remaining commands to the CLI's own runtime docs, not to another bundle file. Content is split exactly along likelihood-of-use lines: pipeline-only orchestration and driver-specific commands are out of the always-loaded path.

Specificity

"Run browser tests for pages affected by the current branch or PR" names the domain (browser tests on change-affected pages) and one concrete action (run/check), but does not enumerate the several specific actions the skill performs (map files to routes, resolve the dev-server port, exercise interactions, capture evidence, report a summary). It matches the anchor for 1-2 concrete actions without comprehensive coverage; the level-above anchor requires a list of several specific actions, which this does not have.

Completeness

The description explicitly answers both questions: what ("Run browser tests for pages affected by the current branch or PR") and when ("Use when asked to run or check browser tests for the current change"). The when-clause is a concrete trigger phrase in natural user-request form, matching the level-5 anchor; the level-4 anchor (a 'when' that could be more explicit) does not apply since nothing here is implied.

Trigger Term Quality

Natural phrases a user would say are present — "run browser tests", "check browser tests", "branch or PR", "the current change" — with a trigger clause phrased the way a request actually arrives ("Use when asked to run or check..."). It falls short of comprehensive synonym coverage: common variations like "e2e", "end-to-end", or "integration tests" are missing, which is exactly the level-4 anchor (good coverage, a few natural terms missing) rather than the 5 anchor.

Distinctiveness Conflict Risk

"Browser tests" scoped to "pages affected by the current branch or PR" carves a clear niche with distinct triggers, and the when-clause names the specific invocation context (asked to run/check browser tests for the current change). Minimal overlap with adjacent skills (unit tests, linting, general browser automation with no change scope), matching the level-5 anchor.