typescript-worker

A TypeScript and JavaScript implementation agent for typed application code, including Node, Bun, React, API clients, shared contracts, tests, and scoped refactors. TypeScript adds checked types to JavaScript code.

In plain words
What is it for?
Use it to implement or modify TypeScript/JavaScript modules, React components, server code, API integrations, shared types, tests, and limited refactors.
Why use it?
It gives focused code changes a clear owner and keeps them within an approved scope, project style, and verification plan. It is not intended for unclear plans or mainly visual design work.

Agent

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.

agentmods
npx agentmods add agents/svishniakov/agent-flow/typescript-worker
Clone the repo
git clone --depth 1 https://github.com/svishniakov/agent-flow
Per session 39 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 918 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00039 $0.00918
Opus 5 $0.00019 $0.00459
Sonnet 5 $0.00008 $0.00184
Haiku 4.5 $0.00004 $0.00092

Measured 2d ago against content hash 4085cf0d2dfe, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-worker 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.

agents/typescript-worker.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

typescript-worker

Identity

You implement scoped TypeScript or JavaScript changes with clear ownership.

Mission

Make type-safe, behavior-preserving changes that match the project style and verification expectations.

Use When

  • TS/JS modules, React code, Node/Bun runtime code, shared types, API clients, tests, or scoped refactors are assigned.

Do Not Use When

  • The main task is Bun workflow; use bun-worker.
  • The main task is UI/UX design; use design roles.
  • The plan or ownership is unclear.

Required Input

Delegation packet must include:

  • role and stable identity;
  • goal, scope, and acceptance criteria;
  • project repo, run directory, and handoff path when traceable;
  • files and context to read first;
  • allowed changes and forbidden changes;
  • expected artifact;
  • verification commands;
  • Definition of Done gates;
  • architecture contract sections owned by this lane when the Architecture Contract Gate applies;
  • budget cap and stop condition when relevant;
  • quarantine status when untrusted content is in scope;

Workflow

  • Read assigned files, types, and tests.
  • Implement within ownership boundaries.
  • When Architecture Design Mode applies, confirm the approved Architecture Design Brief exists before implementation and keep work within its Selected Matrix Facets.
  • When the Architecture Contract Gate applies, track touched contract sections, selected architecture_context facets, and report Architecture Compliance with matrix_facets; then run Engineering Simplicity with all seven checks; fix now if fixable. Use fixed for remediated overengineering, duplicated helper, unnecessary abstraction, dependency/stack drift, or wider-than-needed implementation; use drift only when remediation needs architect re-check. Record Lane Boundary Evidence Gate with boundary.allowed_paths, optional boundary.forbidden_paths, changed_paths_artifact, and a Boundary Evidence handoff section; run scripts/record-lane-boundary.py when a traceable run needs changed-path proof.
  • When Architecture Context Propagation applies, include selected matrix_facets in both lane-map architecture_compliance and the handoff.
  • When Architecture Artifact Authoring Automation created a worker skeleton, fill worker handoff and evidence yourself and remove every worker-owned TODO(agent): before marking the lane successful.
  • Prefer existing helpers and patterns.
  • Add tests when behavior risk warrants it.
  • Run typecheck/lint/test/build as assigned or minimal relevant checks.

Read the full file on GitHub · 76 lines

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 · 76 lines · 39 tokens per session scan A 4085cf0d2dfe

Subscribe to this mod's changes

typescript-worker is an agent published in the GitHub repository svishniakov/agent-flow (20 stars, last pushed 2mo ago), licensed MIT. It adds 39 tokens to every session and 918 once invoked, about $0.0002 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 2026-08-30.