Agent Skills

A collection of agent skills for Claude Code, Codex and other AI coding agents.

The local responsibility-boundary links in the branch-finish and review-resolution attribution references are pinned to commit 61919613972e63f2c833c1c5ad4744d7c40ad05a to preserve their targets before a repository layout change.

The repository root is the plugin root, with one shared skills/ directory. plugin.json supplies portable metadata; .claude-plugin/, .codex-plugin/, and .antigravity-plugin/ contain platform manifests. Codex interface settings remain in its compatibility manifest. Host installation and invocation of this layout remain subject to separate verification.

Install

# All at once

npx skills add sentimony/skills -a codex claude-code -y

# Or each separately

npx skills add sentimony/skills -s web-debug -a codex claude-code -y
npx skills add sentimony/skills -s vitest -a codex claude-code -y
npx skills add sentimony/skills -s typescript -a codex claude-code -y
npx skills add sentimony/skills -s echarts -a codex claude-code -y
npx skills add sentimony/skills -s scope-triage -a codex claude-code -y
npx skills add sentimony/skills -s plan-crafting -a codex claude-code -y
npx skills add sentimony/skills -s dashfix -a codex claude-code -y
npx skills add sentimony/skills -s negafix -a codex claude-code -y
npx skills add sentimony/skills -s prose-crafting -a codex claude-code -y
npx skills add sentimony/skills -s commit-all -a codex claude-code -y
npx skills add sentimony/skills -s maintaining-agent-context -a codex claude-code -y
npx skills add sentimony/skills -s frontend-crafting -a codex claude-code -y
npx skills add sentimony/skills -s tdd -a codex claude-code -y
npx skills add sentimony/skills -s debugging -a codex claude-code -y
npx skills add sentimony/skills -s review-request -a codex claude-code -y
npx skills add sentimony/skills -s cross-review -a codex claude-code -y
npx skills add sentimony/skills -s review-resolution -a codex claude-code -y
npx skills add sentimony/skills -s verification-gate -a codex claude-code -y
npx skills add sentimony/skills -s git-worktree-isolation -a codex claude-code -y
npx skills add sentimony/skills -s parallel-agents -a codex claude-code -y
npx skills add sentimony/skills -s inline-plan-dev -a codex claude-code -y
npx skills add sentimony/skills -s subagent-plan-dev -a codex claude-code -y
npx skills add sentimony/skills -s branch-finish -a codex claude-code -y
npx skills add sentimony/skills -s skill-crafting -a codex claude-code -y
npx skills add sentimony/skills -s secret-hygiene -a codex claude-code -y
npx skills add sentimony/skills -s gh-switch -a codex claude-code -y
npx skills add sentimony/skills -s scope-check -a codex claude-code -y
npx skills add sentimony/skills -s webapp-debugger -a codex claude-code -y

Or as one plugin, skills, from the sentimony/marketplace marketplace, in Claude Code:

claude plugin marketplace add sentimony/marketplace
claude plugin install skills@sentimony   # all 28 skills
claude plugin install aw@sentimony       # workflow chain, code review, session learnings, from sentimony/agentic-workflow

or in Codex:

codex plugin marketplace add sentimony/marketplace
codex plugin add skills@sentimony
codex plugin add aw@sentimony

Plugin skills are namespaced by their plugin: /skills:scope-triage, /skills:skill-crafting. The marketplace pins each plugin to a release tag of its repository.

Migrating from 1.58.14

From 1.58.15 all 28 skills are in the one skills plugin again: devflow, writing, skill-crafting, and echarts are gone, and this repository no longer hosts a marketplace. claude plugin marketplace add sentimony/skills stops working; the sentimony marketplace now comes from sentimony/marketplace. Remove the old plugins and marketplace, then install skills@sentimony from the new one.

In Claude Code, then restart the session:

claude plugin uninstall devflow@sentimony
claude plugin uninstall writing@sentimony
claude plugin uninstall skill-crafting@sentimony
claude plugin uninstall echarts@sentimony
claude plugin uninstall skills@sentimony
claude plugin marketplace remove sentimony
claude plugin marketplace add sentimony/marketplace
claude plugin install skills@sentimony

In Codex:

codex plugin remove devflow@sentimony
codex plugin remove writing@sentimony
codex plugin remove skill-crafting@sentimony
codex plugin remove echarts@sentimony
codex plugin remove skills@sentimony
codex plugin marketplace remove sentimony
codex plugin marketplace add sentimony/marketplace
codex plugin add skills@sentimony

Commands namespaced by the old plugins change prefix: /devflow:scope-triage becomes /skills:scope-triage.

Migrating from 1.58

/scope-check no longer runs scope-triage. From 1.58.5 it is a standalone skill that renders a saved spec or plan to an HTML preview; invoke /scope-triage directly.

Skills

All skills ship in the skills plugin: claude plugin install skills@sentimony.

Skill	Description
scope-triage	Classify request scope before design work, then route to direct implementation, a light spec, or a full design cycle.
scope-check	Render a saved spec or plan to an HTML preview link and keep the folder README index current.
plan-crafting	Turn an approved design or settled requirements into a bite-sized, TDD-oriented implementation plan.
inline-plan-dev	Execute an existing implementation plan inline in the current session, with plan-reality reconciliation, proportional verification, and durable resume.
subagent-plan-dev	Execute an existing implementation plan through scoped subagents with risk-based dispatch, independent verification, and controlled escalation.
git-worktree-isolation	Select, detect, or create a safe isolated development workspace with explicit ownership, baseline, and handoff.
parallel-agents	Prove work units independent, isolate mutable state, and dispatch one bounded parallel wave with reconciled results.
tdd	Drive behavior changes through valid RED, sufficient GREEN, and evidence-backed refactoring.
cross-review	Hand a plan or a finished implementation to the opposite agent CLI and the Antigravity CLI in parallel, or to one named reviewer, for an independent read-only review.
review-request	Prepare and dispatch independent code review against requirements, exact scope, and the actual diff.
review-resolution	Validate and resolve code-review findings with evidence, explicit dispositions, and proportional re-review decisions.
debugging	Investigate bugs and unexpected technical behavior with a root-cause-first evidence workflow.
verification-gate	Turn a completion claim into an evidence-backed verdict against the current tree.
branch-finish	Decide, execute and report the integration outcome for verified work, cleaning up only what is provably safe to remove.
prose-crafting	Edit prose for its reader, purpose, and author's voice while preserving meaning; audit or explain editorial choices without scoring.
dashfix	Replace typographic dashes with the plain hyphen in text of any language, keeping the spaces, and audit a project with a per-occurrence catalog.
negafix	Ban negative parallelism ("it's not just X, it's Y"), audit prose for it, and score it 0-100.
skill-crafting	Create, improve, evaluate, optimize, split, merge, and retire agent skills with measured trigger boundaries and package-owned evals.
echarts	Build, audit, style, debug, and optimize Apache ECharts visualizations in vanilla JS, React, or Vue.
web-debug	Debug and verify local web apps via Playwright.
webapp-debugger	Experimental, /webapp-debugger only: debug and verify local web apps via agent-browser.
commit-all	Gather the working tree into one commit per repository the session changed, on the current branch or a new one the user picks, when the user asks to commit everything.
gh-switch	Switch the GitHub CLI to the account a project names in .env/.env before gh commands, check that its GitLab token belongs to GL_ACC, and report in one line.
frontend-crafting	Build, implement, redesign, review, and refine user-facing interfaces, including implementation-framed frontend changes, with subject-driven design decisions and a verifiable quality gate.
vitest	Configure, write, debug, run, migrate, and audit Vitest tests for JavaScript/TypeScript projects.
typescript	Configure tsconfig, diagnose compiler behavior, design type-safe APIs without silencing diagnostics, and audit or migrate TypeScript projects.
maintaining-agent-context	Create, audit, restructure, and maintain a repository's agent instruction architecture for Claude Code and Codex.
secret-hygiene	Use credentials for real work while keeping their values out of transcripts, logs, commits, and PR texts.

Development Workflow

scope-triage is the development entry point. It classifies the request and picks the minimum appropriate process, so a one-line configuration change and a new subsystem do not receive the same ceremony.

                         scope-triage
                              │
               ┌──────────────┼──────────────┐
               │              │              │
            Route A        Route B        Route C
         direct work     light spec      full design
               │              │              │
               │         direct work     plan-crafting
               │              │              │
               │              │        ┌─────┴─────┐
               │              │        │           │
               │              │   inline-plan   subagent-plan
               │              │      -dev           -dev
               └──────────────┴────────┬───────────┘
                                      │
                               implementation
                                      │
                         behavior change → tdd
                                      │
                 review-request (when warranted)
                                      │
             review-resolution (when findings exist)
                                      │
                              verification-gate
                                      │
               branch-finish (when lifecycle exists)
                                      │
                                   complete

When work fails unexpectedly, the diagnostic path runs alongside the main flow and returns to whatever workflow discovered the failure.

any development stage
        │
        ▼
     debugging
        │
        ├── browser evidence needed
        │          │
        │      web-debug
        │          │
        └──────────┘
        │
     root cause
        │
        ├── material redesign needed → scope-triage
        │
        ├── behavior correction → tdd
        │
        ▼
       fix
        │
        ▼
return to calling workflow

Four properties of this workflow are worth stating explicitly.

tdd is used within implementation, whenever behavior changes. It is a micro-cycle inside a task rather than a sequential phase that follows implementation. Both execution modes and direct implementation invoke it at the moment a behavior change is written.
Review is proportional; verification is authoritative. review-request is invoked when the change warrants independent eyes, and review-resolution validates findings before anything is changed in response. A review verdict stands separate from completion: verification-gate owns the authoritative pass or fail against the current tree.
The diagnostic path has three distinct owners. debugging owns causal investigation, web-debug supplies browser and runtime evidence when the symptom lives in a page, and tdd drives the regression behavior once the cause is known. The fix then returns to the workflow that discovered the failure.
The workflow is composable rather than mandatory-linear. Every step after scope-triage is reached on a condition. Route A terminates in implementation with proportional verification, and branch-finish runs only when a branch or workspace lifecycle exists.

Conditional capabilities, invoked when the work calls for them rather than in sequence: skill-crafting, tdd, debugging, web-debug, git-worktree-isolation, parallel-agents, frontend-crafting, vitest, typescript, echarts.

Have fun ;)