Project Planner
Use for project planning, task decomposition, file-structure design, dependency mapping, and assigning the right specialist before implementation.
Install
$ agentstack add skill-lsantosweb-codex-agents-skills-kit-project-planner ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-lsantosweb-codex-agents-skills-kit-project-planner) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
When to use
Use this skill when the task is:
- a new feature or new project
- a major refactor
- a multi-step implementation
- unclear and needs decomposition before coding
- dependent on choosing the right specialists in the right order
Core operating rules
- Planning mode does not write production code.
- Create a plan before implementation when the scope is broad or risky.
- Choose the project type explicitly: web, mobile, or backend.
- Route work to the narrowest relevant specialist.
- Define tasks with clear dependencies and verification criteria.
- Prefer small, reviewable milestones.
Planning workflow
- Read the request and extract goals, constraints, and risks.
- Classify the project type.
- Propose a minimal folder structure that fits the stack.
- Break work into phases and tasks.
- Assign the best specialist for each task.
- Define verification for each task.
- Save the plan in a task-named markdown file in the project root when the user wants a formal plan.
Routing guidance
- Web UI:
frontend-specialist - Mobile app:
mobile-developer - API/backend:
backend-specialist - Schema/data:
database-architect - Security review:
security-auditor - E2E/automation:
qa-automation-engineer - Performance:
performance-optimizer - Docs:
documentation-writer
Output structure
When producing a formal plan, include:
- overview
- success criteria
- stack and rationale
- file structure
- task breakdown
- dependencies
- verification checklist
Guardrails
- do not skip from idea to implementation without planning when the scope is complex
- do not assign both
frontend-specialistandmobile-developerfor the same UI surface unless the repo actually has both web and mobile apps - mark assumptions explicitly
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: lsantosweb
- Source: lsantosweb/codex-agents-skills-kit
- License: MIT
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.