Conciseness

The body teaches only skill-specific protocol: "Read the issue again before every write", "You push after every commit. A run can end at any moment", and exact commands like "git ls-remote --exit-code --heads origin tessl/<id>". No concept Claude already knows is explained, no section is padded, and every token carries operational weight, matching the lean anchor 5 rather than anchor 4 (which would still contain trimmable over-explanation).

Actionability

Nearly everything is copy-paste executable: "gh issue view <n> --json number,title,body,url,state,labels,assignees,author,comments", "gh pr create --base <base> --label tessl --title \"#<n>: <what the change does>\"", "git merge --no-ff origin/<base>", the literal started-work comment block, and the "tessl launch attach-link" invocation. It sits at anchor 4 rather than 5 only because a few pieces are described rather than templated: the PR body is specified as a contents list ("why the change exists and what it does; what you ran and saw") instead of a literal block, and test commands are deferred to AGENTS.md/CLAUDE.md/README.md.

Workflow Clarity

The "Situations" section is an ordered decision tree ("Read the record and take the first situation that applies") with explicit validation checkpoints and feedback loops: re-read the issue before every write, check the stop condition before every write, run tests again after merging the base, and on PR-creation failure "run `gh pr list --head <branch> --state open` before trying again". This matches anchor 5 (clear sequence, explicit validation, error-recovery loops) and exceeds anchor 4, where checkpoints would have gaps; the risky force-push case is also guarded with an explicit `--force-with-lease` recipe.

Progressive Disclosure

The skill is a single self-contained file with clear, well-ordered sections (inputs, GitHub, done-state, situations, invariants, doing the work, judgment) and no nested or buried references; the paths it names (`.cloud-launch/trigger-events.json`, `setup.sh`, `AGENTS.md`) are runtime inputs, clearly signaled. It fits anchor 4 (good structure, content appropriately placed, minor organization gaps) rather than 5 because at ~130 dense lines the one-level-deep reference pattern of anchor 5 is absent and sections such as the 11-item invariants list could plausibly live in a companion file for a leaner overview.

Specificity

"read the issue and the repository, make the change on the issue's own branch, run the tests, and open one pull request" names four concrete actions plus a concrete stop behavior ("Stops without a trace when a person has taken the issue back"), comprehensively covering the task with no vague filler. It clearly matches the anchor for multiple specific concrete actions and comprehensive coverage, not the level below ("several specific actions; minor gaps").

Completeness

The "what" is explicit and concrete (read issue and repo, change on the issue's own branch, run tests, open one PR) and the "when" is explicitly stated with a concrete trigger phrase: "a person labelled `tessl`", reinforced by the stop condition "when a person has taken the issue back". This matches anchor 5 (clearly and explicitly answers both what AND when with concrete trigger phrases) rather than anchor 4, where the when would be present but less explicit.

Trigger Term Quality

Natural terms a user would say are present: "GitHub issue", "implement", "branch", "run the tests", "open one pull request", plus the concrete label trigger "tessl". It falls at anchor 4 (good keyword coverage; a few natural terms missing) rather than 5 because common variations like "fix an issue", "close an issue", or "open a PR" are absent, and it is not comprehensive enough for the synonym-and-extension-level coverage of anchor 5.

Distinctiveness Conflict Risk

The `tessl` label gives this a clear niche with a distinct trigger, but the opening "Implement a GitHub issue" and "open one pull request" overlap with generic issue-implementation and PR-creation skills, leaving minor overlap risk with closely related skills. It fits anchor 4 better than 5 because the distinctness rests almost entirely on the label qualifier rather than wholly distinct trigger terms.