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Eclipse Sunset

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Python
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Eclipse Sunset

MCP deprecation radar — detects deprecated/removed tools and versions from witnessed registry snapshots and generates a migration diff for an agent's config.

Scope label: LOCAL / fixture. v0.1 ingests local registry snapshot JSON files only. It does not crawl live registries. Live crawling is a later phase.

Status: v0.1.1 — CERTIFIED (local, fixture) (Verity re-bench, 2026-10-26: probe 5 chain-attack suite 4/4 + strict extras 9/9, full prior suite 44/44; D1 closed). Spec: SPEC.md.

Novel mechanism

Sunset notices are witnessed against registry history, so a "deprecated" claim is provable — and the migration diff is generated from the witnessed before/after schemas, not scraped docs.

Each ingested snapshot is SHA-256 hashed over its canonical JSON and hash-chained in ingest order (chain_hash = sha256(prev_hash + snapshot_hash)). Findings cite both snapshot hashes of the witnessed pair. A claim with no witnessed pair behind it returns UNPROVEN.

Related MCP server: dsh-schema-migration-proof

Tools (exactly 5)

Tool

What it does

ingest_snapshot

Validate a snapshot (server_id, version, tools[] with name/inputSchema/deprecated), hash it, chain-append it; returns snapshot id + chain position.

detect_sunsets

Between two witnessed snapshots of the same server: tools removed, tools newly deprecated, version changes, schema-breaking changes — each finding cites both snapshot hashes.

migration_diff

Given a server + an agent config listing tools used, produce the diff: which used tools are sunset in the newer witnessed snapshot and what changed in their schemas.

verify_sunset_claim

Claim "tool X deprecated/removed" → PROVEN only if a witnessed snapshot pair supports it, else UNPROVEN.

chain_status

Verify hash-chain integrity (recomputes every hash + link; tamper → valid: false).

Fixtures

fixtures/weather-v1.json and fixtures/weather-v2.json: the same fixture server at v1.0.0 / v2.0.0 — one tool removed (legacy_lookup), one deprecated (get_alerts), one schema-breaking change (get_forecast gains required units), one unchanged (convert_units). fixtures/agent-config.json is a sample agent config for migration_diff.

Pricing

FREE + funnel role — free radar feeds paid listing-hygiene and re-bench work. No payment anything in this server.

Run

python3 server.py            # MCP over stdio JSON-RPC
python3 -m unittest discover -s tests -v

State (the witnessed chain ledger) lives in data/ or the directory named by SUNSET_DATA_DIR.

Python 3, standard library only.

MIT License · Copyright © 2026 Cyan Eclipse Technologies LLC · cetech.ai

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Maintenance

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