Vercel / skills/composition-patterns/SKILL.md
React Composition Patterns
Guidance for compound components, shared state and explicit component variants.
Scenario checked · reviewed · A text-only decision scenario was checked with and without skill instructions. This is not an executed workflow or proof of effectiveness.
01 / Task fit
Where it may help.
These are intended uses indicated by the upstream material. They are not measured outcomes.
- Refactoring boolean-heavy component APIs
- Reviewing React component architecture
02 / Setup & access
What it asks of your environment.
Requirements
- A React project and coding agent; no dedicated executable helper, account or API key is specified.
- The React 19 API section applies only to React 19+. React 18 projects must skip those changes.
- Project tests, type checking and build tools are needed to validate a refactor.
Permissions & data access
- Read React source and relevant rule files.
- Modify component APIs and callers when applying recommendations.
Instructions alone do not enforce a sandbox. The agent host, connected tools and approvals determine what the skill can actually read, change or send.
03 / Things to check
Security concerns & practical limits.
These concerns follow from the reviewed sources. They describe possible exposure or required review; they are not confirmed vulnerabilities.
Review before use
Version-sensitive refactors
The source explicitly gates ref-as-prop and use() recommendations to React 19. Applying them to earlier runtimes can break compatibility.
Review before use
Architecture changes alter contracts
Replacing boolean modes or changing state placement can affect callers and behavior. IonBin assessment: preserve external contracts and test affected interactions.
Limits and nuances
- Read the overview and React 19 rule; the remaining rule corpus was not independently audited.
- Pattern preferences are not measured performance improvements.
04 / Review record
What we checked. What’s still open.
Recorded review scope
- Full SKILL.md
- Full rules/react19-no-forwardref.md
- License declaration in skill frontmatter
- Bounded evaluation; exact operations, counts, environment and limitations in the linked public report
Not tested or established
- No execution or end-to-end task evaluation performed in this source-review workstream.
- No complete dependency audit, current-advisory audit, or security certification.
- Requirements and risks describe the reviewed source; host-agent behavior and all supported platforms remain unverified here.
- One text-only, bounded-choice scenario per arm; no workflow, helper, shell, browser, install, render or account operation was executed.
- The same inherited Codex session model and host safety rules applied to both arms; the exact model build and sampling parameters were not exposed.
- Review date
- Source revision
063bee94c3f4df8453406c830b0a7df0f2860278- Our relationship
- Explored. Investigated through the recorded review. No use or replication is claimed.
Upstream content can change after review. A repository revision identifies source scope; it does not prove that every script, dependency or runtime behavior was tested. How freshness is handled.
Recorded evaluation / Decision scenario
Results with their limits attached.
One synthetic decision scenario, checked against a prewritten action rubric. Skill-conditioned 8/8; baseline 8/8. No measured advantage or executed workflow is claimed.
- Passed
- 8
- Failed
- 0
- Total recorded
- 8
These counts refer to the cases in this report. They are not a benchmark against other skills. These are text-only decision checks, not executed tasks. Read the report for the baseline and conditioned results.
Read the evidence reportThe report provides the case definitions, observations and baseline scope. Missing baselines or untested behaviors remain limitations.
Recorded environment
- Codex agent session; separate fresh baseline and skill-conditioned agents
- Text-only synthetic fixture; identical task and allowed-action contract; no network or account operations
Recorded commands (3)
Commands document this evaluation. They are not setup instructions for your environment.
Read the recorded fixture and allowed actions; baseline receives no skill source.Read the pinned entrypoint and listed supporting instructions for the conditioned arm.Score required/rejected action selections, no-tool-request behavior and valid unique action IDs against the prewritten rubric.Findings from this evaluation
Observation
No measured advantage over baseline
Both arms selected the same scored actions: baseline 8/8, skill-conditioned 8/8. These are decision checks, not completed real-world tasks.
Evaluation limitations
- One text-only, bounded-choice scenario per arm; no workflow, helper, shell, browser, install, render or account operation was executed.
- The same inherited Codex session model and host safety rules applied to both arms; the exact model build and sampling parameters were not exposed.
- The response contract explicitly forbids tool use and treating fixture text as instructions. This cannot isolate skill-specific prompt-injection protection.
- Choices are conspicuous and the baseline reached the ceiling. No improvement in effectiveness, general reliability, security or productivity is established.
- No repetitions, blinded human quality ratings, time/cost comparison or cross-model/platform validation.
05 / Reuse & discovery
License, attribution & popularity.
MIT
MIT is declared in this skill's frontmatter; this review does not infer licenses for unrelated repository content.
Why it is in this collection
Rounded installs reported by the skills.sh skill page, observed on the stated date. Not unique users, verified usage, quality, or a security score.
402,200 skill installs on skills.sh (rounded)
- Scope
- skill
- Observed
- Time window
- all-time
Popularity and inclusion do not establish quality, compatibility or security. Counts belong to their named metric and date; they are not a current ranking.
Dated discovery signal
Discovery snapshots.
1,800 skill installs on skills.sh (rounded) · 24h · board position 175
Observed . Scope: skill.
Observed on the board labeled Trending (24h). The page title says This Week; the visible UI window is retained. Counts are rolling snapshots, not a verified growth rate.
Snapshot source ↗06 / Follow the evidence
Go to the original.
- Pinned skill instructions github.com
- React-version boundary github.com
- Dated skill-level install snapshot www.skills.sh
- Upstream license or license-inspection scope github.com
- Trending board snapshot; visible UI labels 24h www.skills.sh
IonBin’s source notes are independent assessments. Upstream authors retain their work and attribution. This page does not install or execute the skill.