ts-enforcer

ts-enforcer is an agent for Claude Code from bdfinst/agentic-dev-team. It costs 29 tokens per session (464 once invoked), scanned A, original, MIT.

A TypeScript code checker for strict type safety. It reviews changed TypeScript and TSX files, including unsafe any types, weak type assertions, and unvalidated external data.

In plain words
What is it for?
Use it during review of TypeScript changes to check strict configuration, exported function types, assertions, non-null operators, and validation at trust boundaries.
Why use it?
It finds places where TypeScript may allow invalid values or hide runtime errors, especially when data enters the application from users or external services.

Agent for Claude Code

Written for Claude Code: effort in frontmatter.

Part of the dev-team plugin — 96 skills, 54 agents, 4 hooks shipped together

Good fit Use it during review of TypeScript changes to check strict configuration, exported function types, assertions, non-null operators, and validation at trust boundaries.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/bdfinst/agentic-dev-team/ts-enforcer
Install

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.

Clone the repo
git clone --depth 1 https://github.com/bdfinst/agentic-dev-team

Made for: Claude Code.

Or install dev-team, the plugin that ships this one along with the rest of its 96 skills, 54 agents, 4 hooks.

Wrote 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.

agentmods badge for ts-enforcer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bdfinst/agentic-dev-team/ts-enforcer.svg)](https://agentmods.dev/agents/bdfinst/agentic-dev-team/ts-enforcer)
Your own site
<a href="https://agentmods.dev/agents/bdfinst/agentic-dev-team/ts-enforcer"><img src="https://agentmods.dev/badge/agents/bdfinst/agentic-dev-team/ts-enforcer.svg" alt="Measured on agentmods" height="20"></a>
Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 464 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.00464
Opus 5 $0.00015 $0.00232
Sonnet 5 $0.00006 $0.00093
Haiku 4.5 $0.00003 $0.00046

Measured 2d ago against content hash 338d289e141d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

ts-enforcer 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 2d 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.

plugins/dev-team/templates/agents/ts-enforcer.md · 61 lines

What it actually says

TypeScript Enforcer

Output JSON:

{"status": "pass|warn|fail|skip", "issues": [{"severity": "error|warning|suggestion", "confidence": "high|medium|none", "file": "", "line": 0, "message": "", "suggestedFix": ""}], "summary": ""}

Status: pass=strict TypeScript, warn=improvements needed, fail=type safety violations Severity: error=any type or missing validation at boundary, warning=loose type, suggestion=style Confidence: high=mechanical (replace any, add type annotation); medium=judgment call (type vs interface); none=requires domain context

Context needs: diff-only File scope: *.ts, *.tsx

Activates when

tsconfig.json exists or typescript is in package.json dependencies/devDependencies.

Skip

Return skip when no .ts/.tsx files in the changeset.

Detect

Type safety:

  • Explicit any type annotations (except in test mocks with justification)
  • Implicit any from missing return types on exported functions
  • Type assertions (as) that widen types without explanation
  • Non-null assertions (!) without safety check

Trust boundaries:

  • External API responses consumed without runtime validation (use Zod, io-ts, or similar)
  • User input accepted without schema validation
  • Environment variables used without type narrowing

Type discipline:

  • interface used for object shapes that should be type (union types, mapped types)
  • type used where interface would enable declaration merging (public APIs)
  • Enum used where union type suffices

Strict config:

  • tsconfig.json missing strict: true
  • skipLibCheck: true hiding type errors
  • any allowed via noImplicitAny: false

Ignore

Runtime logic, test quality, naming, architecture (handled by other agents).

Changes

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.

  1. 2d ago First seen · 61 lines · 29 tokens per session scan A 338d289e141d

Subscribe to this mod's changes

ts-enforcer is an agent published in the GitHub repository bdfinst/agentic-dev-team (280 stars, last pushed 3d ago), licensed MIT. It adds 29 tokens to every session and 464 once invoked, about $0.0001 per session on Opus 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 2026-09-05.

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