Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add TwiTech-LAB/devchain --skill improve-codebase-architecturegit clone --depth 1 https://github.com/TwiTech-LAB/devchainWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/twitech-lab/devchain/improve-codebase-architecture)<a href="https://agentmods.dev/skills/twitech-lab/devchain/improve-codebase-architecture"><img src="https://agentmods.dev/badge/skills/twitech-lab/devchain/improve-codebase-architecture/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/twitech-lab/devchain/improve-codebase-architecture"><img src="https://agentmods.dev/badge/skills/twitech-lab/devchain/improve-codebase-architecture.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00136 | $0.02586 |
| Opus 5.5 | $0.00054 | $0.01034 |
| Sonnet 5.5 | $0.00027 | $0.00517 |
| Haiku 4.5 | $0.00014 | $0.00259 |
Grade A, and why
improve-codebase-architecture scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 19d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 19d ago Changed · +9 lines · +28 tokens per session 23fcf14f31b6
- 1mo ago First seen · 135 lines · 108 tokens per session scan A 2593ebb9cc41
improve-codebase-architecture is a skill published in the GitHub repository TwiTech-LAB/devchain (104 stars, last pushed 3d ago), with no licence file. It adds 136 tokens to every session and 2,586 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
review-team
Use when assigned a review or when an authored review boundary is reached.
ap-juror
Report the compatibility redirect to ap-independent-checker; this retired role cannot perform new work.
ap-reviewer
Report the compatibility redirect to ap-independent-checker; this retired role cannot perform new work.
ap-sweeper
Report the compatibility redirect to ap-independent-checker; this retired role cannot perform new work.
arch-check
An architecture and implementation review tool that examines how a codebase is modeled, divided into responsibilities, organized into modules, and connected by dependencies. It also checks for issues such as circular dependencies, over-design, and violations of common design principles.
god-review
Independent fresh-context review of the current changes against the plan or the listed requirements for correctness, tests, blast radius, safety, and fit, then fix and record the outcome. Use for /god-review, "review this", or before shipping.