SpecMgr MCP server

by dfch·io.github.dfch/biz-dfch-specmgr·v0.38.0·2 stars

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An artifact manager for system specifications.

A92/100grade A

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A92/100

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Adoption

Growing

2 stars496 downloads/wk

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SpecMgr tools

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How SpecMgr compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 92/100; higher than 93% of 48,243 servers
GitHub stars: 2; more than 75% of 28,706 servers
Downloads a week: 496; more than 88% of 12,306 servers with a package

Release history: 11 versions in the registry since 2026-09-14, latest 2026-10-31, typically one every 5 days.

Install SpecMgr in Claude Code, Cursor or VS Code

claude mcp add biz-dfch-specmgr -- uvx biz-dfch-specmgr

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What the publisher says

From the SpecMgr repository's README, as published. We do not edit it. Read it on GitHub

biz.dfch.SpecMgr

An artifact manager for system specifications.

This project is an MCP server that you can use to manage different specification artifacts — see Concepts for the full list of artifact types and how they relate, and MCP Server / docs/MCP.md for the tool/resource/prompt reference.

The MCP server (and the management CLI) are optional. You install them as "extras" (see Installation).

Concepts
Installation
CLI Usage
MCP Server
Usage
Development
Testing
Make a Release
License

Concepts

Every artifact is a plain markdown file with a YAML frontmatter block on disk — git-friendly, diffable, and readable/editable by hand. The filesystem is always the source of truth; the MCP server wraps it with structured, validated read/write/list/status tools (see Usage).

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

SpecMgr: common questions

Is SpecMgr MCP server safe?: Yes, by our scan: it is graded A (92/100). Read the SpecMgr safety report
How do I install SpecMgr?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does SpecMgr need an API key?: No secret keys are declared. It reads 14 settings from the environment.
Is SpecMgr maintained?: The last commit was 33 days ago (2026-10-03). The latest release is v0.38.0.
How does SpecMgr compare with other MCP servers?: safety score 92/100 (higher than 93% of 48,243 servers); github stars 2 (more than 75% of 28,706 servers); downloads a week 496 (more than 88% of 12,306 servers with a package). Full comparison.

Run it through the gateway

Local package. It runs on your machine, not through the gateway.

Rating: —
Safety grade: A · 92/100
Stars: 2
Downloads/wk: 496
Price: Free
Licence: AGPL-3.0
Transport: Local · pypi
Version: 0.38.0
Category: Everything else
Last release: 2026-10-03

Credentials it needs

SPECMGR_MCP_TRANSPORTTransport mode for the MCP server.
SPECMGR_MCP_HOSTBind address, SSE/streamable-http mode only.
SPECMGR_MCP_PORTTCP port, SSE/streamable-http mode only.
SPECMGR_ADR_DIRBase directory scanned for Architecture Decision Record (.md) files.
SPECMGR_DOCS_DIRShared base directory root for the document-type domains that do not have their own dedicated directory environment variable (req, uc, tsk, qa, prb, gol, rsk, dec, sop, vcr, sysrs, txt). Each domain's own subdirectory is appended automatically, e.g. docs/req.
SPECMGR_FEAT_DIRBase directory scanned for Feature folders (<base>/<id>/README.md).
SPECMGR_SIMILARITY_DISABLEDPresence-based opt-out for the semantic-similarity search feature (the find_related and find_similar_text tools): set to any value to disable the feature, so that every call returns a structured unavailable result and the embedding model is never loaded, and to skip the similarity phase of the unified server-startup warmup thread. Unset by default. Its resolved state is reported by the similarity section of the specmgr://config resource.
SPECMGR_FEAT_WARMUP_DISABLEDPresence-based opt-out for the feat domain's two background cache-warming phases (frontmatter and full-parse) of the unified server-startup warmup thread: set to any value to skip both phases; when set together with SPECMGR_SIMILARITY_DISABLED, no warmup thread is started at all. Unset by default. Its resolved state is reported by the feat_warmup_disabled field of the specmgr://config resource.
SPECMGR_PLANTUML_JARPath to a plantuml.jar, one of exactly three PlantUML validation-source selectors (the first one set, in JAR then BIN then URL order, is the only source used; no fall-through, no PATH discovery, no public default; all three unset is the offline structure-only floor). Unset by default. The selected source is reported by the plantuml section of the specmgr://config resource.
SPECMGR_PLANTUML_BINPath to an executable speaking the PlantUML CLI contract, one of exactly three PlantUML validation-source selectors (the first one set, in JAR then BIN then URL order, is the only source used; no fall-through, no PATH discovery, no public default; all three unset is the offline structure-only floor). Unset by default. The selected source is reported by the plantuml section of the specmgr://config resource.
SPECMGR_PLANTUML_URLPlantUML server base URL, one of exactly three PlantUML validation-source selectors (the first one set, in JAR then BIN then URL order, is the only source used; no fall-through, no PATH discovery, no public default; all three unset is the offline structure-only floor). Diagram content is only sent to a PlantUML server if this variable is set. Unset by default. The selected source is reported by the plantuml section of the specmgr://config resource.
SPECMGR_DIAGRAM_MAX_TITLEMaximum length (in characters) of a resolved node's title label in the reference-graph diagrams (the get_reference_diagram / get_reference_diagram_all MCP tools and the specmgr diagram refs CLI): labels longer than the limit are cut at the last word boundary within the limit (a hard cut when there is none) with an ellipsis appended; the diagram title itself and unresolved node ids are never truncated. An integer; the default 40 applies when the variable is unset or set to an invalid value (empty, non-integer, or less than 1).
SPECMGR_TESTS_NO_DOTENVPresence-based test/CI sentinel: set to any value to skip the CLI's module-level default .env load entirely, so the process runs under the CI (source-less) condition whatever the local (gitignored) .env configures; this is what keeps the specmgr coverage-badge pre-commit hook's source-less re-run source-less end-to-end. Unset by default, never set outside test runs.
FASTEMBED_CACHE_PATHCache directory for the semantic-similarity feature's embedding model (the third-party fastembed backend's own variable, not a SPECMGR_* one): set to a directory to cache the model there; an unset or empty value falls back to the default <tempdir>/fastembed_cache, where <tempdir> is the process's temporary directory (e.g. /tmp on Linux). Unset by default. The resolved directory is reported by the similarity section of the specmgr://config resource.

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