Koji Hasegawa
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refine-tests
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Reviews existing test code for conformance to the test-designing-guide and test-writing-guide, then applies the refinements.
Scope Check
This skill is for refining existing tests for conformance to the guides. If the request is out of scope, redirect:
- Adding tests for a new feature or spec change → use
/plan-featureinstead - A failing test, or a test that verifies incorrect behavior → use
/fix-buginstead
Input
One or more file path arguments. Resolve them to the concrete set of test files to review before proceeding.
If no path argument is given, use AskUserQuestion to ask the user for the targets. Do not derive targets from git status — that would silently widen the scope beyond what was requested.
Workflow
Recording implementation notes: Notes for this run go in /tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.md. Immediately before your first append in this run — and only then — delete that file if it exists (usually it will not), so this run starts from an empty one: the session id is shared by every /refine-tests run in the session, so an earlier run abandoned before Step 7 would otherwise leak its notes into this one.
While working through Steps 5–6, whenever one of the following occurs, immediately append a line to that file — do not wait until the end to reconstruct these from memory:
- A Finding was ambiguous, or proved wrong once applied, and you made a judgment call → Design decisions
- You intentionally departed from a Finding, and why → Deviations
- You considered alternatives and chose one, and why → Tradeoffs
- You changed production code — a method demoted to
private, a dead test-only seam removed, or any other production edit — and why → Production code changes
Append with Bash so the shell expands $CLAUDE_CODE_SESSION_ID — the Write tool cannot append and does not expand environment variables:
cat >> "/tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.md" <<'EOF'
- **Production code changes**: <one line>
EOF
When a step delegates to another skill (/simplify and /resolve-diagnostics in Step 6), append the note yourself from what it returns — they do not write to this file.
Step 1: Read the Target Tests
Launch Explore agent(s) to read the target test file(s) and the production code they exercise. Reading the production code is necessary to judge layer-appropriateness and structural-vs-spec-based issues.
Step 2: Conformance Review
Load the test-designing-guide and test-writing-guide skills. Apply all rules that are verifiable from the test code alone — no requirements document is available.
The following sections of test-designing-guide require requirements input or production-design changes and are out of scope:
- Section 5 (requirements coverage / traceability / same-layer witness)
- Section 6 (design-document output format)
- Section 7 (Testability Assessment — remedies require production-design changes)
Produce a Findings list. Each finding records:
- Location: file path + test method name
- Category: which guide + rule violated, or duplicate test (see Step 3)
- Concrete proposed change
Step 3: Duplicate Detection
Compare the target test files against each other and against other tests in the same test class.
A true duplicate has both of the following in common with another test:
- Same condition — identical setup / input
- Same assertion — identical observation / expected value
Do NOT flag tests that share only one:
- Different condition → not a duplicate
- Same condition but different assertion → not a duplicate
For each true duplicate pair, append a Finding to the Findings list from Step 2:
- Proposed change: delete the redundant test (the less accurately named one) and keep the more accurately named one. Name both explicitly.
- Do NOT propose merging same-condition tests into a single multi-assert test.
Exception — defer to Step 4: If one test in a duplicate pair is [Category("Internal")] and the other is a public-seam test, do not apply the name-quality tiebreaker here. Do not delete the public-seam test on naming grounds. Defer the pair to Step 4, which always keeps the public-seam test.
Step 4: Seam Redundancy — Internal-Method Tests
Test through the same seam production code uses. A [Category("Internal")] test exercises an internal method directly. For each such test in the targets, append Findings via two passes. Overriding rule: never trade coverage for a tidier seam; when in doubt, keep the test (and keep internal).
Layer scope: This step operates within the unit test layer only. Tests marked [Category("Integration")] or [Category("VisualVerification")] run under different execution contexts and are not candidates for a covering test — do not consider them when searching for a public-seam test that covers the same scenario.
Pass 1 — classify each [Category("Internal")] test:
- A public-seam test already covers it (from the test code alone): a separate unit test asserts the same observable outcome for an equivalent scenario through a public method → Finding: delete the internal test, keep the public-seam test (name both).
- No public-seam test covers it — using the production code read in Step 1: a. Not fully observable through public — a public caller masks or only partially exposes the asserted outcome → keep the internal test; no Finding. "Cheap to extract" ≠ "observable publicly." b. Sanctioned extraction — the method takes 3 or more parameters (a heuristic; the real trigger is that several independent conditions combine so exhaustive public-seam coverage cost explodes — this can also occur with fewer parameters that each take many values, and may not apply when the extra parameters don't drive branching), and it isolates cohesive sub-logic (a pure computation or decision that depends on only 1–2 of those inputs) → keep the internal test; no Finding. Applies regardless of how the test was created. c. Otherwise (consolidatable into public) → Finding: rewrite the test to assert the same observable outcome through the public method (merge with an existing public-seam test where natural). The Finding must name explicitly: the target public method to go through, the existing public-seam test to merge into (or state that a new test method is created, with its name), and the observable outcome to assert — the implementer applies the Finding as written and must not need to re-derive these decisions.
Pass 2 — visibility sweep: for each internal method whose direct internal test goes away in Pass 1 (deleted via 1 or moved via 2c), search the whole solution for usages (internal is visible cross-assembly via InternalsVisibleTo — check other production and test assemblies, not just files in scope):
- Test-only seam wrapped in
#if UNITY_INCLUDE_TESTS, test now gone → Finding: remove the dead seam. - Nothing outside the declaring class still needs
internalaccess → Finding: demote the method toprivate(do not break any#ifconditional compilation). - Any doubt, or any remaining cross-assembly
internaluse → leave itinternal; no Finding.
Pass 2 Findings change production code — record the file path + method explicitly.
Step 5: Modify Tests
- Load the
test-writing-guideskill — and thecode-writing-guideskill if the Findings include production changes; do not rely on automatic skill triggering - Apply the changes described in the Findings list from Steps 2–4 — test edits, plus any production visibility changes (a method demoted to
private, or a dead test-only seam removed) - Run tests with
/run-testsand confirm all pass
Step 6: Refactoring
- Run the Claude Code built-in
/simplifyskill (Skill({skill: "simplify"})— not a plugin skill) to apply quality improvements to the modified code - Run tests with
/run-testsand confirm all pass - Run
/resolve-diagnosticswith the files modified in Step 5 — compute the list after/simplifyfinishes, so its edits are covered too - Commit all remaining changes to git
Step 7: Implementation Notes
Read/tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.mdif it exists — if it was never created, every category is "None"- Report its entries to the user in chat under
## Implementation Notes— one bold sub-heading per category, each followed by a bullet list. Always include all five categories in this order: Design decisions, Deviations, Tradeoffs, Production code changes, Open questions. Write- Nonefor any category with nothing recorded, and add any last-minute Open questions before finalizing - Delete the temporary notes file if it exists
File metadata
name: refine-tests description: >- Reviews existing test code for conformance to the test-designing-guide and test-writing-guide, then applies the refinements. Use this skill when the user wants to review or refine existing test code so it follows the project's test design and writing conventions. Typically invoked as `/refine-tests <PATH>`. argument-hint: "[file paths]" license: Unlicense metadata: author: Koji Hasegawa
View original text
---
name: refine-tests
description: >-
Reviews existing test code for conformance to the test-designing-guide and
test-writing-guide, then applies the refinements. Use this skill when the
user wants to review or refine existing test code so it follows the
project's test design and writing conventions.
Typically invoked as `/refine-tests <PATH>`.
argument-hint: "[file paths]"
license: Unlicense
metadata:
author: Koji Hasegawa
---
Reviews existing test code for conformance to the test-designing-guide and test-writing-guide, then applies the refinements.
## Scope Check
This skill is for refining **existing** tests for conformance to the guides. If the request is out of scope, redirect:
- Adding tests for a new feature or spec change → use `/plan-feature` instead
- A failing test, or a test that verifies incorrect behavior → use `/fix-bug` instead
## Input
One or more file path arguments. Resolve them to the concrete set of test files to review before proceeding.
If no path argument is given, use `AskUserQuestion` to ask the user for the targets. Do not derive targets from `git status` — that would silently widen the scope beyond what was requested.
## Workflow
**Recording implementation notes:** Notes for this run go in `/tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.md`. Immediately before your **first** append in this run — and only then — delete that file if it exists (usually it will not), so this run starts from an empty one: the session id is shared by every `/refine-tests` run in the session, so an earlier run abandoned before Step 7 would otherwise leak its notes into this one.
While working through Steps 5–6, whenever one of the following occurs, immediately append a line to that file — do not wait until the end to reconstruct these from memory:
- A Finding was ambiguous, or proved wrong once applied, and you made a judgment call → **Design decisions**
- You intentionally departed from a Finding, and why → **Deviations**
- You considered alternatives and chose one, and why → **Tradeoffs**
- You changed production code — a method demoted to `private`, a dead test-only seam removed, or any other production edit — and why → **Production code changes**
Append with `Bash` so the shell expands `$CLAUDE_CODE_SESSION_ID` — the `Write` tool cannot append and does not expand environment variables:
```bash
cat >> "/tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.md" <<'EOF'
- **Production code changes**: <one line>
EOF
```
When a step delegates to another skill (`/simplify` and `/resolve-diagnostics` in Step 6), append the note yourself from what it returns — they do not write to this file.
### Step 1: Read the Target Tests
Launch Explore agent(s) to read the target test file(s) and the production code they exercise. Reading the production code is necessary to judge layer-appropriateness and structural-vs-spec-based issues.
### Step 2: Conformance Review
Load the `test-designing-guide` and `test-writing-guide` skills. Apply all rules that are **verifiable from the test code alone** — no requirements document is available.
The following sections of `test-designing-guide` require requirements input or production-design changes and are **out of scope**:
- Section 5 (requirements coverage / traceability / same-layer witness)
- Section 6 (design-document output format)
- Section 7 (Testability Assessment — remedies require production-design changes)
Produce a **Findings** list. Each finding records:
- Location: file path + test method name
- Category: which guide + rule violated, or *duplicate test* (see Step 3)
- Concrete proposed change
### Step 3: Duplicate Detection
Compare the target test files against each other and against other tests in the same test class.
A **true duplicate** has **both** of the following in common with another test:
- **Same condition** — identical setup / input
- **Same assertion** — identical observation / expected value
Do NOT flag tests that share only one:
- Different condition → not a duplicate
- Same condition but different assertion → not a duplicate
For each true duplicate pair, append a Finding to the Findings list from Step 2:
- Proposed change: delete the redundant test (the less accurately named one) and keep the more accurately named one. Name both explicitly.
- Do NOT propose merging same-condition tests into a single multi-assert test.
**Exception — defer to Step 4:** If one test in a duplicate pair is `[Category("Internal")]` and the other is a public-seam test, do **not** apply the name-quality tiebreaker here. Do not delete the public-seam test on naming grounds. Defer the pair to Step 4, which always keeps the public-seam test.
### Step 4: Seam Redundancy — Internal-Method Tests
Test through the same seam production code uses. A `[Category("Internal")]` test exercises an `internal` method directly. For each such test in the targets, append Findings via two passes. Overriding rule: **never trade coverage for a tidier seam; when in doubt, keep the test (and keep `internal`).**
**Layer scope:** This step operates within the **unit test layer only**. Tests marked `[Category("Integration")]` or `[Category("VisualVerification")]` run under different execution contexts and are not candidates for a covering test — do not consider them when searching for a public-seam test that covers the same scenario.
**Pass 1 — classify each `[Category("Internal")]` test:**
1. **A public-seam test already covers it** (from the test code alone): a separate **unit** test asserts the **same observable outcome** for an **equivalent scenario** through a **public** method → Finding: delete the internal test, keep the public-seam test (name both).
2. **No public-seam test covers it** — using the production code read in Step 1:
a. **Not fully observable through public** — a public caller masks or only partially exposes the asserted outcome → keep the internal test; no Finding. "Cheap to extract" ≠ "observable publicly."
b. **Sanctioned extraction** — the method takes **3 or more parameters** (a heuristic; the real trigger is that several *independent* conditions combine so exhaustive public-seam coverage cost explodes — this can also occur with fewer parameters that each take many values, and may not apply when the extra parameters don't drive branching), **and** it isolates cohesive sub-logic (a pure computation or decision that depends on only 1–2 of those inputs) → keep the internal test; no Finding. Applies regardless of how the test was created.
c. **Otherwise (consolidatable into public)** → Finding: rewrite the test to assert the same observable outcome through the public method (merge with an existing public-seam test where natural). The Finding must name explicitly: the target **public method** to go through, the **existing public-seam test to merge into** (or state that a new test method is created, with its name), and the **observable outcome to assert** — the implementer applies the Finding as written and must not need to re-derive these decisions.
**Pass 2 — visibility sweep:** for each `internal` method whose direct internal test goes away in Pass 1 (deleted via 1 or moved via 2c), search the **whole solution** for usages (`internal` is visible cross-assembly via `InternalsVisibleTo` — check other production and test assemblies, not just files in scope):
- Test-only seam wrapped in `#if UNITY_INCLUDE_TESTS`, test now gone → Finding: remove the dead seam.
- Nothing outside the declaring class still needs `internal` access → Finding: demote the method to `private` (do not break any `#if` conditional compilation).
- Any doubt, or any remaining cross-assembly `internal` use → leave it `internal`; no Finding.
Pass 2 Findings change **production** code — record the file path + method explicitly.
### Step 5: Modify Tests
1. Load the `test-writing-guide` skill — and the `code-writing-guide` skill if the Findings include production changes; do not rely on automatic skill triggering
2. Apply the changes described in the Findings list from Steps 2–4 — test edits, plus any production visibility changes (a method demoted to `private`, or a dead test-only seam removed)
3. Run tests with `/run-tests` and confirm **all pass**
### Step 6: Refactoring
1. Run the Claude Code built-in `/simplify` skill (`Skill({skill: "simplify"})` — not a plugin skill) to apply quality improvements to the modified code
2. Run tests with `/run-tests` and confirm **all pass**
3. Run `/resolve-diagnostics` with the files modified in Step 5 — compute the list **after** `/simplify` finishes, so its edits are covered too
4. Commit all remaining changes to git
### Step 7: Implementation Notes
1. `Read` `/tmp/refine-tests-notes-$CLAUDE_CODE_SESSION_ID.md` if it exists — if it was never created, every category is "None"
2. Report its entries to the user in chat under `## Implementation Notes` — one bold sub-heading per category, each followed by a bullet list. Always include all five categories in this order: **Design decisions**, **Deviations**, **Tradeoffs**, **Production code changes**, **Open questions**. Write `- None` for any category with nothing recorded, and add any last-minute Open questions before finalizing
3. Delete the temporary notes file if it exists
Review the source
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Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: Unlicense
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Low GitHub adoption signal
- AI review approval is missing
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 21 GitHub stars
- Stars/forks activity: 21 stars, 3 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Review status: AI review approval is missing
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Start with one small task
- 1Read the source. Confirm the input, expected output, dependencies and permissions.
- 2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
- 3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Source & usage notes
IndexedStatic Checked
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
- Source repository
- nowsprinting/unity-coding-skills
- License
- Unlicense
- Version
- Unknown
- Last GitHub push
- Sep 13, 2026
- Registry updated
- Sep 14, 2026
- Instruction path
- skills/refine-tests/SKILL.md @ 47ffe6374693
Version reported in registry metadata; check source releases before relying on it.
Quality
55/100
Promising
Trust
58/100
Do not auto-install
Audit
71/100
Needs review
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Low GitHub adoption signal
- AI review approval is missing
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 21 GitHub stars
- Stars/forks activity: 21 stars, 3 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Review status: AI review approval is missing
- Verified installs
- —
- Outcomes
- —
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.
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This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
More details
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"risk_label": "Needs review",
"warnings": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Low GitHub adoption signal",
"AI review approval is missing",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"GitHub adoption: 21 GitHub stars",
"Stars/forks activity: 21 stars, 3 forks; issue activity unavailable in current metadata"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 55,
"label": "Promising"
},
"supply": {
"track": "Coding and developer agents",
"scenario": "Coding agents",
"maintenance": "22d since push",
"risk": "Needs review"
},
"alternative_skills": [],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"production agents without a repository review",
"Low GitHub adoption signal",
"No OpenAgentSkill engagement data yet",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"AI review approval is missing"
],
"agent_contract": {
"task_input": "Use refine-tests in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 66/100 Manual review",
"Audit: 71/100 Needs review",
"Safety: 31/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "nowsprinting-refine-tests (refine-tests)",
"install_command": "npx skills add nowsprinting/unity-coding-skills --skill refine-tests",
"risk_summary": "Needs review; Blocked for auto-install; Review before production",
"verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
}
},
"outcome_feedback": {
"endpoint": "https://www.openagentskill.com/api/agent/outcome",
"method": "POST",
"requires_resolve_event_id": true,
"event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
"expected_outcomes": [
"success",
"failed",
"not_relevant",
"blocked_by_risk",
"setup_required"
],
"payload_template": {
"event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
"skill_slug": "nowsprinting-refine-tests",
"task": "Use refine-tests in an agent workflow",
"agent": "codex",
"outcome": "success",
"install_used": true,
"risk_blocked": false,
"setup_required": false,
"task_success": true,
"output_quality": 4,
"error_type": null,
"human_review_required": false,
"workspace": "sandbox",
"time_to_useful_ms": 120000,
"notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
}
},
"endpoints": {
"web": "https://www.openagentskill.com/skills/nowsprinting-refine-tests",
"api": "https://www.openagentskill.com/api/agent/skills/nowsprinting-refine-tests",
"audit": "https://www.openagentskill.com/skills/nowsprinting-refine-tests/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=nowsprinting-refine-tests&task=Use%20refine-tests%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20refine-tests%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20refine-tests%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/nowsprinting-refine-tests/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/nowsprinting-refine-tests"
}
}For the creator
Listing source
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- Creator
- Koji Hasegawa
- Indexed by
- OpenAgentSkill community index
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