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mattermost-mcp-development

mattermost-mcp-development is a skill for Claude Code, Codex from Knuckles-Team/mattermost-mcp. It costs 43 tokens per session (691 once invoked), scanned A, original, MIT.

A development guide for the Mattermost connector, which links Mattermost to an MCP-based coding assistant. It covers changes to its tools, API mappings, packaging, documentation, tests, and release checks.

In plain words
What is it for?
Use it when changing the connector or preparing a small, reviewable commit and release.
Why use it?
It keeps connector changes within the correct repository and prevents duplicated implementations, missing tests, or secrets in source and logs.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions AGENTS.md.

not rated 0repo changed 9d ago A scan 43 tokens original MIT

Good fit Use it when changing the connector or preparing a small, reviewable commit and release.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/knuckles-team/mattermost-mcp/mattermost-mcp-development
View source ↗ Knuckles-Team/mattermost-mcp
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.

Any agent
npx skills add Knuckles-Team/mattermost-mcp --skill mattermost-mcp-development
Clone the repo
git clone --depth 1 https://github.com/Knuckles-Team/mattermost-mcp

Made for: Claude Code, Codex.

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 mattermost-mcp-development

README.md
[![agentmods](https://agentmods.dev/badge/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development/github.svg)](https://agentmods.dev/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development)
Your own site
<a href="https://agentmods.dev/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development"><img src="https://agentmods.dev/badge/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development/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.

agentmods 80×15 button for mattermost-mcp-development

Your own site · 80×15
<a href="https://agentmods.dev/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development"><img src="https://agentmods.dev/badge/skills/knuckles-team/mattermost-mcp/mattermost-mcp-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 691 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 $0.00043 $0.00691
Opus 5.5 $0.00017 $0.00276
Sonnet 5.5 $0.00009 $0.00138
Haiku 4.5 $0.00004 $0.00069

Measured 9d ago against content hash 5d5e6d272a22, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mattermost-mcp-development 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 9d 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.

mattermost_mcp/skills/mattermost-mcp-development/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mattermost-mcp development

This repository owns the Mattermost transport, mappings, MCP tools, and agent entry points. Shared connector contracts and transports belong to scion-sdk; admission, serving, and durable graph state belong to their owning repositories. Read AGENTS.md before changing code and keep provider credentials and endpoints out of source, logs, and skill content.

Rapid delivery: the 5-minute contract

Specs are already designed. Deliver small, reviewable slices and cite the owning spec row in the commit trailer.

  • Find the owning row first with git grep -n "<term>" -- specs and extend that spec before adding new requirement text.
  • Reuse existing SDK clients, transport policies, and tool factories. Do not create a second implementation of a connector capability.
  • Keep changes scoped to this connector. A change owned by the SDK, Arbora, or the knowledge graph belongs in that repository instead.
  • Every delivered requirement needs a bound test. Generated status.json files are produced by pipelines-hook spec-status; never hand-edit them.
  • One logical change per commit, with Spec: <ID> and the assisting agent trailer adjacent in the final paragraph.

Setup and gates

Use the pinned environment from uv sync --locked. Run the repository gate from the checkout root:

uvx pre-commit run --all-files

For focused feedback, run the relevant tests with the repository's pinned environment, for example:

uv run --all-extras pytest tests/test_mcp_server.py -q
uv run --all-extras pytest tests/test_api_client.py -q

The canonical .pre-commit-config.yaml delegates connector-standard, secrets, spec, and tests-fast checks to Knuckles-Team/pipelines at rev: main. Do not replace those shared hooks with local copies or bypass a failing check.

Connector-specific checks

  • Keep the MCP and agent surfaces aligned with scion-sdk.
  • Validate environment and TLS settings before making provider calls.
  • Mock external Mattermost calls in tests; never use live credentials in a local gate.
  • Keep mattermost_mcp/skills/ package data intact when adding skills.
  • Documentation lives under docs/ and is published by the shared Pages workflow; source status records live under specs/.

Read the full file on GitHub · 80 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. 9d ago Changed 5d5e6d272a22
  2. 11d ago First seen · 80 lines · 43 tokens per session scan A add531933147

Subscribe to this mod's changes

mattermost-mcp-development is a skill published in the GitHub repository Knuckles-Team/mattermost-mcp (0 stars, last pushed 2d ago), licensed MIT. It adds 43 tokens to every session and 691 once invoked, about $0.0002 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 2026-10-28.

Building agentsTestingconnectordevelopmentgatesmattermost-mcptest
Related

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mattermost-mcp-development next to 6 skills from other repositories
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