kb/concepts/ bekommt Areas: layout: fuer concept, Area-Titel aus jedem Type-Spec, Schwellen-Empfehlung im lint (schliesst #59)
Files changed: - CHANGES.md - README.md - VERSION - kb/concepts/Ambient Environment Dependency.md - kb/concepts/Anti-Cramming Heuristic.md - kb/concepts/Audit Trail.md - kb/concepts/BM25.md - kb/concepts/Bulk Operations.md - kb/concepts/CI Integration.md - kb/concepts/COLLECTION.md - kb/concepts/CPPC.md - kb/concepts/Checkpoint Audit.md - kb/concepts/Claude Code Auto Mode.md - kb/concepts/Command Round-Trip Integrity.md - kb/concepts/Confidence Scoring.md - kb/concepts/Consolidation Tiers.md - kb/concepts/Content Quality Control.md - kb/concepts/Context Isolation.md - kb/concepts/Contradiction Resolution.md - kb/concepts/Cross-platform Agent Skills.md - kb/concepts/Crystallization.md - kb/concepts/Delete Rather Than Anonymize.md - kb/concepts/Denylist over Allowlist.md - kb/concepts/Detect-Repair Asymmetry.md - kb/concepts/Diff-Reviewable Agent Edits.md - kb/concepts/Dual Licensing by File Plan.md - kb/concepts/Entity Extraction.md - kb/concepts/Episodic Memory.md - kb/concepts/Event-Driven Automation.md - kb/concepts/Filter on Ingest.md - kb/concepts/Forgetting.md - kb/concepts/Graph Traversal.md - kb/concepts/Green Suite Blind Spot.md - kb/concepts/Hooks.md - kb/concepts/Hybrid Search.md - kb/concepts/INDEX.md - kb/concepts/Implementation Spectrum.md - kb/concepts/Index Scaling.md - kb/concepts/Issue Label Scheme.md - kb/concepts/Iteration and Cost Limits.md - kb/concepts/KB Migration.md - kb/concepts/KB Stack Versioning.md - kb/concepts/Knowledge Compounding.md - kb/concepts/Knowledge Graph.md - kb/concepts/LLM Wiki Pattern.md - kb/concepts/Lint Workflow.md - kb/concepts/MCP-Leseserver.md - kb/concepts/Mass-Update Gate.md - kb/concepts/Memory Lifecycle.md - kb/concepts/Mesh Sync.md - kb/concepts/Modbus.md - kb/concepts/Multi-Agent Collaboration.md - kb/concepts/Naming Convention Conflict.md - kb/concepts/OKF Compatibility.md - kb/concepts/Optional Instance Context File.md - kb/concepts/Personalization Plane.md - kb/concepts/Privacy and Governance.md - kb/concepts/Procedural Memory.md - kb/concepts/Publish-Remote Gate.md - kb/concepts/Quality Scoring.md - kb/concepts/Quality and Self-Correction.md - kb/concepts/RAG.md - kb/concepts/Reciprocal Rank Fusion.md - kb/concepts/SSD TRIM.md - kb/concepts/Scale Ceiling.md - kb/concepts/Self-Healing.md - kb/concepts/Semantic Lint Automation.md - kb/concepts/Semantic Memory.md - kb/concepts/Session Orientation.md - kb/concepts/Shared vs Private.md - kb/concepts/Split Merge Reclassify.md - kb/concepts/Split Threshold.md - kb/concepts/Structural Enforcement over Documented Rule.md - kb/concepts/Stub Threshold.md - kb/concepts/Supersession.md - kb/concepts/Three-Layer Architecture.md - kb/concepts/Token Economics.md - kb/concepts/Typed Relationships.md - kb/concepts/User Management.md - kb/concepts/Vector Search.md - kb/concepts/Work Coordination.md - kb/concepts/Workflow Extraction.md - kb/concepts/Workflow Orchestration.md - kb/concepts/Working Memory.md - kb/concepts/Write-Once Frontmatter Fields.md - kb/concepts/architectures/Consolidation Tiers.md - kb/concepts/architectures/Context Isolation.md - kb/concepts/architectures/Cross-platform Agent Skills.md - kb/concepts/architectures/Episodic Memory.md - kb/concepts/architectures/Hybrid Search.md - kb/concepts/architectures/Implementation Spectrum.md - kb/concepts/architectures/Knowledge Graph.md - kb/concepts/architectures/LLM Wiki Pattern.md - kb/concepts/architectures/MCP-Leseserver.md - kb/concepts/architectures/Memory Lifecycle.md - kb/concepts/architectures/OKF Compatibility.md - kb/concepts/architectures/Optional Instance Context File.md - kb/concepts/architectures/Personalization Plane.md - kb/concepts/architectures/Procedural Memory.md - kb/concepts/architectures/RAG.md - kb/concepts/architectures/Scale Ceiling.md - kb/concepts/architectures/Semantic Memory.md - kb/concepts/architectures/Three-Layer Architecture.md - kb/concepts/architectures/Token Economics.md - kb/concepts/architectures/Working Memory.md - kb/concepts/decisions/Delete Rather Than Anonymize.md - kb/concepts/decisions/Denylist over Allowlist.md - kb/concepts/decisions/Diff-Reviewable Agent Edits.md - kb/concepts/decisions/Dual Licensing by File Plan.md - kb/concepts/decisions/Issue Label Scheme.md - kb/concepts/decisions/KB Stack Versioning.md - kb/concepts/decisions/Structural Enforcement over Documented Rule.md - kb/concepts/patterns/Audit Trail.md - kb/concepts/patterns/BM25.md - kb/concepts/patterns/Command Round-Trip Integrity.md - kb/concepts/patterns/Confidence Scoring.md - kb/concepts/patterns/Contradiction Resolution.md - kb/concepts/patterns/Entity Extraction.md - kb/concepts/patterns/Filter on Ingest.md - kb/concepts/patterns/Forgetting.md - kb/concepts/patterns/Graph Traversal.md - kb/concepts/patterns/Mesh Sync.md - kb/concepts/patterns/Quality Scoring.md - kb/concepts/patterns/Reciprocal Rank Fusion.md - kb/concepts/patterns/Self-Healing.md - kb/concepts/patterns/Shared vs Private.md - kb/concepts/patterns/Typed Relationships.md - kb/concepts/patterns/Vector Search.md - kb/concepts/patterns/Work Coordination.md - kb/concepts/problems/Ambient Environment Dependency.md - kb/concepts/problems/Detect-Repair Asymmetry.md - kb/concepts/problems/Green Suite Blind Spot.md - kb/concepts/problems/Naming Convention Conflict.md - kb/concepts/problems/Write-Once Frontmatter Fields.md - kb/concepts/protocols/CPPC.md - kb/concepts/protocols/Modbus.md - kb/concepts/protocols/SSD TRIM.md - kb/concepts/workflows/Anti-Cramming Heuristic.md - kb/concepts/workflows/Bulk Operations.md - kb/concepts/workflows/CI Integration.md - kb/concepts/workflows/Checkpoint Audit.md - kb/concepts/workflows/Claude Code Auto Mode.md - kb/concepts/workflows/Content Quality Control.md - kb/concepts/workflows/Crystallization.md - kb/concepts/workflows/Event-Driven Automation.md - kb/concepts/workflows/Hooks.md - kb/concepts/workflows/Index Scaling.md - kb/concepts/workflows/Iteration and Cost Limits.md - kb/concepts/workflows/KB Migration.md - kb/concepts/workflows/Knowledge Compounding.md - kb/concepts/workflows/Lint Workflow.md - kb/concepts/workflows/Mass-Update Gate.md - kb/concepts/workflows/Multi-Agent Collaboration.md - kb/concepts/workflows/Privacy and Governance.md - kb/concepts/workflows/Publish-Remote Gate.md - kb/concepts/workflows/Quality and Self-Correction.md - kb/concepts/workflows/Semantic Lint Automation.md - kb/concepts/workflows/Session Orientation.md - kb/concepts/workflows/Split Merge Reclassify.md - kb/concepts/workflows/Split Threshold.md - kb/concepts/workflows/Stub Threshold.md - kb/concepts/workflows/Supersession.md - kb/concepts/workflows/User Management.md - kb/concepts/workflows/Workflow Extraction.md - kb/concepts/workflows/Workflow Orchestration.md - kb/index.md - kb/log.md - tools/CONTRACT.md - tools/README.md - tools/chemenu/catalog.py - tools/chemenu/commands/index_build.py - tools/chemenu/lint_core.py - tools/chemenu/tests/conftest.py - tools/chemenu/tests/test_cite_cmd.py - tools/chemenu/tests/test_git_publish.py - tools/chemenu/tests/test_index_build.py - tools/chemenu/tests/test_lint.py - tools/chemenu/tests/test_new_page.py - tools/chemenu/tests/test_provenance.py - tools/chemenu/tests/test_type_resolver.py - tools/chemenu/tests/test_xref.py - types/concept.md - types/type-spec.md
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type: types/concept.md
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concept_type: architecture
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tags: [mcp, library-boundary, search, server]
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created: 2026-09-02
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modified: 2026-09-02
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related:
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- operates-on: wikitool
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- see-also: Publish-Remote Gate
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- see-also: Mass-Update Gate
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- see-also: Iteration and Cost Limits
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- see-also: Chemenu
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sources: [Source - MCP Read Server Implementation Session 2026-09-02]
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confidence: 0.50
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confidence_base: 0.50
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provenance: sourced
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summary: 'Zweiter Konsument von chemenu ueber MCP: search/types/describe_type/lint/status auf chemenu.api.Corpus, strukturell ohne Schreibpfad, jede Antwort trage einen Commit-Stempel.'
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---
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# MCP-Leseserver
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**Typ:** Architecture
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## Definition
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Ein zweiter Konsument desselben Kerns, nicht ein zweites Programm: `tools/chemenu/mcp/` exponiert
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`search`, `types`, `describe_type`, `lint` und `status` über MCP, indem es dieselben Funktionen
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aufruft, die `wikitool` auch aufruft - vermittelt durch `chemenu.api.Corpus`, den In-Process-
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Einstiegspunkt. Ein Golden-Test hält die Ausgaben beider Wege gegeneinander, statt darauf zu
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vertrauen, dass sie übereinstimmen.
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## Kernpunkte
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- **Kein Schreibpfad, strukturell.** Weder der Server noch `chemenu.api` importiert etwas unter
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`chemenu.commands` - `new`, `touch`, `xref`, `publish`, `migrate` sind aus diesem Prozess
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heraus nicht erreichbar, statt aus einer Liste gefiltert zu werden. Ein Test importiert das
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Servermodul in einem frischen Interpreter und prüft
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`sys.modules`.[^s-mcp-read-server-implementation-session-2026-09-02]
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- **Zwei Transports.** `stdio` zum Entwickeln und Testen ohne Netz; `streamable-http` für die
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Auslieferung, der einzige, vor den sich ein HTTP-Reverse-Proxy setzen kann. `sse` ist über das
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SDK erreichbar und wird bewusst nicht angeboten - der abgelöste Remote-Transport, jetzt darauf
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zu bauen verschiebt den Wechsel nur.
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- **Jede Antwort trägt den Commit, aus dem sie berechnet wurde** (`commit`, `as_of`). Ein
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veralteter Checkout antwortet sonst selbstbewusst falsch. `null` heißt: der bediente Baum hat
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uncommittete Änderungen, die Antwort entspricht keiner Revision. Der Stempel ist die Revision,
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aus der die Seiten *tatsächlich* gelesen wurden, nicht die zum Zeitpunkt des Stempelns aktuelle
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- ein Bug, der genau diesen Unterschied überging, wurde beim Schreiben des Golden-Tests selbst
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gefunden und behoben.[^s-mcp-read-server-implementation-session-2026-09-02]
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- **Telemetrie in den bedienten Baum wird beim Start verweigert**, nicht still umgeleitet. Der
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Sync, der den Checkout aktuell hält (`git fetch && git reset --hard`), darf `reports/telemetry/`
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wegräumen; ein Trace, der dort landet, wäre ein Verlust und eine stille Möglichkeit, den Baum
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zu beschmutzen, dessen Sauberkeit der Korpus-Cache prüft.
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- **Kein Iteration Budget Gate im Server.** Das Gate begrenzt eine Agenten-Session am unbemerkten
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Iterieren über den Wiki-Zustand, nicht einen Nutzer, der oft sucht - Retrieval ist deshalb
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bereits generell davon ausgenommen (siehe [[Iteration and Cost Limits]]). Rate Limiting gehört
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stattdessen vor den Prozess, neben die Authentifizierung.
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- **Authentifizierung ist Middleware, nicht Servercode.** Eine Traefik-ForwardAuth-Instanz
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(Bearer-Token gegen SHA-256-Hashes) sitzt vor dem Prozess; nicht sauber authentifizierte
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Zugriffe erreichen Python gar nicht erst.
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- **Gemessen:** Korpus-Parse für 176 Seiten 265 ms → 54 ms (`CSafeLoader`),
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`wikitool search` end-to-end 593 ms → 347 ms; die verbleibenden ~262 ms sind Modulimport und
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entfallen im residenten Serverprozess, weil er ihn einmal pro Start statt pro Aufruf
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zahlt.[^s-mcp-read-server-implementation-session-2026-09-02]
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## Beispiele
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- `search`/`types`/`describe_type`/`lint`/`status` als die fünf Tools - siehe
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`tools/chemenu/mcp/server.py`.
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- Der Korpus-Cache (`chemenu/corpus_cache.py`) hält einen Parse pro Commit und cacht nie einen
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schmutzigen Arbeitsbaum - dieselbe Eigenschaft, die den Antwort-Stempel korrekt hält.
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- `chemenu.api.Corpus`: nimmt einen Root, liefert exakt die `--json`-Formen der CLI, raised statt
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zu exitieren.
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## Wann zu verwenden
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- Ein Konsument, der keine Shell auf der bedienenden Maschine ist, soll dieselben Fragen stellen
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können wie ein Agent, der `wikitool` direkt aufruft.
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- Mehrere gleichzeitige Leser eines Korpus, für die ein Prozess pro CLI-Aufruf (Modulimport,
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Korpus-Parse) unnötigen Overhead bedeutet.
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## Wann NICHT zu verwenden
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- Als Ort für einen Schreibpfad - die Ingest-Queue (geplant, Issue #32) ist ein anderes Design
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mit einer Quarantäne davor, nicht eine Erweiterung dieses Servers.
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- Als Ersatz für den Iteration Budget Gate oder das Traefik-Rate-Limiting - beide bleiben
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notwendig und leben an anderer Stelle.
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## Fußnoten
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[^s-mcp-read-server-implementation-session-2026-09-02]: [[Source - MCP Read Server Implementation Session 2026-09-02]]
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## Beziehungen
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## Siehe auch
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- [[Source - MCP Read Server Implementation Session 2026-09-02]]
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<!-- wikitool:links -->
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## Beziehungen
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- **operates-on:** [[wikitool]]
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- **see-also:** [[Publish-Remote Gate]]
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- **see-also:** [[Mass-Update Gate]]
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- **see-also:** [[Iteration and Cost Limits]]
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- **see-also:** [[Chemenu]]
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<!-- /wikitool:links -->
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