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product-capability

Translate PRD intent, roadmap asks, or product discussions into an implementation-ready capability plan that exposes constraints, invariants, interfaces, and unresolved decisions before multi-service work starts. Use when the user needs an ECC-native PRD-to-SRS lane instead of vague planning prose.

Quality

80%

Does it follow best practices?

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tessl review fix ./.agents/skills/product-capability/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

75%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a well-organized, token-efficient instruction skill with a clear four-step workflow, explicit non-negotiable rules, and a concrete ordered output format. It falls short of top marks mainly for lacking any worked example of the output, a dangling template reference, and the absence of an explicit validation/re-check step in the workflow.

Suggestions

Add a short worked example (a filled-in CAPABILITY/CONSTRAINTS/... block for a small sample ask) so the output format is unambiguous in practice — this would lift both actionability and workflow clarity.

Add an explicit validation step to the workflow, e.g. 'Re-check the constraint list against existing repo docs and PRODUCT.md; resolve or flag every mismatch before handing off', possibly reusing the Non-Negotiable Rules as a checklist.

Fix the dangling reference: either inline a minimal template in place of 'docs/examples/product-capability-template.md' or move a real template file into the skill bundle (e.g. references/product-capability-template.md) and reference it by that path.

DimensionReasoningScore

Conciseness

The body is lean and bullet-driven with no explanation of concepts Claude already knows, but a few editorial lines ("These are the things that often live only in senior-engineer memory", "The goal is not to create another planning stack. The goal is to make hidden capability constraints durable and reusable.") could be trimmed — efficient with minor over-explanation, matching anchor 4 rather than the every-token-earns-its-place 5.

4 / 5

Actionability

As an instruction-only skill it gives concrete, specific guidance: a four-step workflow with defined sub-items, an exact ordered output format template (CAPABILITY/CONSTRAINTS/IMPLEMENTATION CONTRACT/NON-GOALS/OPEN QUESTIONS/HANDOFF), and a named template path. Minor gaps keep it below 5: no worked example of a filled output, and the referenced 'docs/examples/product-capability-template.md' is not part of the skill bundle and cannot be verified here.

4 / 5

Workflow Clarity

A clearly sequenced four-step process (restate capability → resolve constraints → define contract → translate into execution) with the handoff decision (ready / needs architecture review / needs product clarification) and the Non-Negotiable Rules acting as guardrail checkpoints. Below 5 because there is no explicit validation or feedback step (e.g., re-checking the plan against existing repo constraints); above 3 because the sequence and checkpoints are mostly explicit. The skill is neither destructive nor batch, so the workflow cap does not apply.

4 / 5

Progressive Disclosure

A well-sectioned, self-contained body with one clearly signaled one-level reference (the capability template path); the names under 'Translate into execution' (project-flow-ops, tdd-workflow, etc.) are cross-references to other skills, not nested documents. Minor gap: the referenced template file does not exist in the skill directory, a dangling path — good structure with minor organization gaps, matching anchor 4.

4 / 5

Total

16

/

20

Passed

Description

75%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, third-person description that states a concrete capability and an explicit use condition with minimal fluff. Its weaknesses are missing user-natural synonyms (requirements doc, spec) and a when-clause phrased in internal jargon ("ECC-native PRD-to-SRS lane") rather than plain trigger phrases.

Suggestions

Rewrite the 'Use when...' clause in user-natural language, e.g. 'Use when the user mentions a PRD, roadmap item, requirements doc, or feature spec that needs implementation-ready constraints' — replacing the jargon-heavy 'ECC-native PRD-to-SRS lane'.

Add common synonyms and variations users would actually say: 'requirements document', 'spec', 'feature request', 'product requirements' alongside 'PRD intent, roadmap asks, or product discussions'.

Optionally enumerate the concrete deliverables as actions ("extract invariants, define interfaces, flag unresolved decisions") to approach the multiple-specific-actions coverage of the top anchor.

DimensionReasoningScore

Specificity

Names the domain ("PRD intent, roadmap asks, or product discussions") and a concretely specified output artifact ("implementation-ready capability plan that exposes constraints, invariants, interfaces, and unresolved decisions"). It stops short of the 5 anchor's multiple distinct actions — it is one translate action plus a well-specified deliverable — but exceeds the 1-2-action coverage of anchor 3.

4 / 5

Completeness

Both what ("Translate PRD intent... into an implementation-ready capability plan that exposes constraints, invariants, interfaces, and unresolved decisions") and when ("Use when the user needs an ECC-native PRD-to-SRS lane instead of vague planning prose") are present. It misses the 5 anchor because the when-clause relies on internal vocabulary rather than concrete, user-natural trigger phrases.

4 / 5

Trigger Term Quality

Good natural keywords like "PRD intent", "roadmap asks", "product discussions", and "multi-service work", but common user phrasings ("requirements doc", "spec", "feature request") are missing, and "ECC-native PRD-to-SRS lane" is internal jargon a user would not naturally say — between the 3 and 5 anchors, closer to 4.

4 / 5

Distinctiveness Conflict Risk

A clear niche (pre-implementation capability contracting) with distinct triggers (PRD, roadmap, multi-service work), carrying only minor overlap risk with closely related generic planning or spec-writing skills — matches anchor 4 rather than the fully distinct 5 anchor.

4 / 5

Total

16

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

affaan-m/ECC

Path

.agents/skills/product-capability/SKILL.md

Reviewed

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