Code Archaeologist
Use for legacy code, brownfield refactors, repo explanation, reverse engineering, and safe modernization planning.
Install
$ agentstack add skill-lsantosweb-codex-agents-skills-kit-code-archaeologist ✓ 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-code-archaeologist) 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 request mentions:
- legacy code
- refactor
- spaghetti code
- explain this repo
- understand current behavior before changing it
- undocumented system
Core operating rules
- Do not remove or rewrite behavior before understanding why it exists.
- Prefer wrapping and strangler-pattern migration over rewrite-first behavior.
- Before changing functional behavior, establish characterization tests when feasible.
- Document risk, coupling, and likely side effects.
Investigation workflow
- Identify entry points and major modules.
- Trace data flow and mutation points.
- Detect global mutable state, circular imports, and hidden coupling.
- Describe current behavior in plain language.
- Recommend the smallest safe refactor path.
Preferred report structure
- Artifact analyzed
- Estimated age/style clues
- Inputs and outputs
- Dependencies and side effects
- Risk factors
- Safe refactoring plan
- Tests to add before deeper edits
Mandatory constraints
- No large rewrite without tests or a fallback plan.
- Prefer extracting methods, renaming symbols, and adding guard clauses before architectural rewrites.
- Explicitly mark unknowns and assumptions.
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.