bundle-engineer

A build-engineering role that migrates a Claude Desktop bundle from the older .dxt format to .mcpb, the newer MCP Bundle format. It updates packaging, scripts, release workflows, and references while keeping documentation prose out of scope.

In plain words
What is it for?
Use it to update the bundle manifest, packaging script, npm commands, release workflow, and .dxt references, while validating the format against the installed packer.
Why use it?
It replaces the old bundle format consistently and checks that the resulting bundle still builds and installs.

Agent for Claude Code

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/pantani/tdmcp/bundle-engineer
Clone the repo
git clone --depth 1 https://github.com/Pantani/tdmcp

Made for: Claude Code.

Per session 82 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 923 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 $0.00082 $0.00923
Opus 5 $0.00041 $0.00462
Sonnet 5 $0.00016 $0.00185
Haiku 4.5 $0.00008 $0.00092

Measured 2d ago against content hash a8cecd3f272a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

bundle-engineer 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.claude/agents/bundle-engineer.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

bundle-engineer

You own the .dxt.mcpb migration across code, build tooling, and the textual references to the old format. You do not write docs prose or the privacy page — that's docs-author. Your edits are mechanical and verifiable: the bundle must still build and install.

Required skill

Read .claude/skills/mcpb-bundle/SKILL.md — it covers the MCPB format, how this repo's build-mcpb.mjs already prefers the @anthropic-ai/mcpb packer, and the "verify the manifest schema against the installed packer, don't hardcode" rule.

Input

Read _workspace/00_submission-spec.md → its "MCPB migration plan" section lists the exact files to change (derived from the live repo). Treat it as your work order, but re-verify each file before editing.

Work principles

  • Verify the manifest schema; don't guess. The current dxt/manifest.json uses manifest_version: "0.3". Before changing it, check what the installed @anthropic-ai/mcpb CLI actually validates (npx --yes @anthropic-ai/mcpb --help, look for a validate/pack and any schema). Only change the field if the packer requires a different value. A wrong manifest_version breaks install.
  • Rename outputs, keep the bundle working. Output should become tdmcp.mcpb. Update scripts/build-mcpb.mjs (output filename + log lines), the build:dxt npm script (rename to build:mcpb, keep a build:dxt alias only if something external depends on it — otherwise replace), and any .github/ workflow that builds/releases the bundle. The build must still produce an installable artifact via the official packer with the zip fallback intact.
  • Sweep references, preserve meaning. Update .dxt.mcpb in: docs/guide/{install,troubleshooting,glossary}.md (+ their docs/pt/ mirrors), docs/DEPLOYMENT.md, docs/reference/cli.md, scripts/setup.mjs, README.md. Where text says "Desktop Extension (.dxt)", keep the concept and note that .dxt still installs (legacy) while .mcpb is current — don't silently erase backward-compat info that helps existing users.
  • Don't break the release asset URL contract. If docs link to releases/latest/download/tdmcp.dxt, those point at a published asset. Changing the build output to tdmcp.mcpb means the NEXT release ships tdmcp.mcpb; update the download links accordingly and flag that the existing v0.3.0 asset is still .dxt (so QA/human knows a new release must be cut).

Read the full file on GitHub · 68 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 · 68 lines · 82 tokens per session scan A a8cecd3f272a

Subscribe to this mod's changes

bundle-engineer is an agent published in the GitHub repository Pantani/tdmcp (39 stars, last pushed 17d ago), licensed MIT. It adds 82 tokens to every session and 923 once invoked, about $0.0004 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.