This skill grounds a custom reviewer plugin in real evidence. It gathers two evidence streams, translates recurring patterns into rubric dimensions with anchors drawn from the evidence itself, then hands the design to create-review-plugin for scaffolding and validation. It does not scaffold, copy schemas, or run tessl review run — that is create-review-plugin's job.

Input

The user provides the scope to ground the rubric in:

• The skills to review (a directory of SKILL.md files, or "the installed skills"). These are the artefacts the produced plugin will score.
• A PR window for review feedback (a PR number or a time period like "the last 2 weeks").
• Optionally a log window and provider filter.

Step 1 — Gather evidence

Stream A — skills and PR feedback

1. Read each target SKILL.md for its intended behaviour (the description trigger and the workflow body). This is the baseline the rubric scores against.
2. Invoke /find-optimizations over the PR window, scoped to skill / SKILL.md PRs. Consume its findings — each has a Type, Summary, and Evidence (PR numbers and the specific review comments). The types come from find-optimizations' configurable list in .tessl/memory/improvement-types.md (default: skill, rule, hook, test, refactor, verifier); read it for the names in effect. Recurring skill-type feedback is the strongest rubric signal.

Stream B — agent logs (optional)

Run tessl agent-logs view --json --since <ISO timestamp> (add --provider <name> to narrow; it covers claude-code, cursor-ide, cursor-agent, tessl-agent). It reads local session history only. Empty entries means no sessions were found — no local history, as in a cloud sandbox or when collection was never enabled. Then this stream has no evidence: say so, proceed on Stream A alone, and skip the two signals below. Without logs you can't ground a trigger-clarity dimension in a real failed-to-fire transcript — but recurring PR feedback that a description is too vague to tell when the skill fires still grounds that dimension from Stream A. What you must not do is invent a log-based activation example you don't have. Entries present but with empty content is different — it only means nothing happened after <ISO timestamp>; widen the window rather than treating it as no history.

When entries are present, the output is { entries, failures }; each entry has provider, sessionId, and a content transcript. For claude-code, content is the session's raw JSONL event lines. A skill activation shows up in one of two forms: an assistant tool_use block named Skill (the skill is in input.skill), or a user-message slash command — text that starts with /<skill> (sometimes wrapped in <command-name> tags), because Claude Code expands skill slash commands inline rather than as a tool call. Count both as activations. Other providers render the transcript as text; look for the equivalent invocation.

Scan each transcript for two signals:

• Skill didn't activate — a task that matched a skill's purpose where neither activation form for it appears. Count this only when the skill genuinely should have fired; a task its own DO-NOT-TRIGGER guidance excludes is a correct non-activation, not evidence.
• Needed correction — repeated tool errors and retries, or the user redirecting the agent after it acted on a skill.

Step 2 — Map evidence to rubric content

Cluster and dedupe themes across both streams. For each theme, follow references/evidence-to-rubric.md:

• Classify it: a judgmental quality attribute becomes a dimensions[] entry; a binary pass/fail invariant routes out of the rubric — to a verifier (an LLM-judge rule) when no deterministic lint or test can express it, otherwise to a lint/test.
• Group dimensions into judges by what each evaluates. description and content are the built-in evaluation_targets; an evidence-derived domain rubric may define its own (any string). A judge whose evaluation_target is content also requires a scope and scoring_notes — see references/evidence-to-rubric.md.
• Set dimension weights (sum to 1.0 per rubric) and the judge + validation_weight split (sum to 1.0) by how often and how severely the pattern recurred.
• Populate each scores[].example with the actual evidence — the description that failed to fire, the flagged review comment, the corrected diff. Grounded anchors are what this skill adds over the generic template.

Step 3 — Hand off to create-review-plugin

Write the assembled design (judges, their evaluation_target, dimensions with grounded anchors, the scope and scoring_notes of any content judge, and the weight split) to a workspace file, then invoke /create-review-plugin and point it at that file. create-review-plugin scaffolds the directory, copies the schemas, writes the rubric and config files, and validates with tessl review run.

Do not make any changes to the codebase in this skill beyond the design file. Gather, map, and hand off.