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Reported issues for Circuitarium MCP

Pod holds 10 of 10 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded entirely — a maintainer's release checklist is not a warning to a prospective user.

Back to Circuitarium MCP.

Most discussed

RFC: add a Logisim Evolution 4.1 adapter with headless verification

Why

Logisim Evolution is a strong second adapter: its .circ project is XML and the official application exposes headless test-vector and TTY verification. Implementing it behind Circuitarium’s neutral contract will test whether the architecture is genuinely simulator-neutral.

Proposed first milestone

  • Detect a user-supplied Logisim Evolution 4.1 JAR and Java 21+ without redistributing either.
  • Discover and inspect .circ projects.
  • Project circuits into the neutral IR with unknown

Read the thread · 2026-07-26 · closed · 1 comment

Add MCP Prompts for design review, comparison, and cross-model handoff

Why

Different model hosts should receive the same safe workflow guidance without Circuitarium becoming vendor-specific. MCP Prompts can package reliable starter workflows while leaving the user and host model in control.

Proposed prompts

  • Review a circuit design using capabilities → inspect → netlist → ERC.
  • Compare a controlled baseline/candidate pair with both digest guards.
  • Create a cross-model handoff containing project reference, digest, profile, inference mode, findings, and u

Read the thread · 2026-07-26 · closed · 1 comment

Expose MCP Resources for catalogs, compatibility profiles, and synthetic examples

Why

The current tools are strong for active analysis, but static reference data should not consume tool calls or be repeated in every result. MCP Resources are a better fit for component catalogs, compatibility profiles, schemas, and synthetic examples.

Proposed scope

Add bounded, read-only resource discovery and reads for URIs such as:

  • circuitarium://capabilities
  • circuitarium://profiles/crumb.unity/1.3.5
  • circuitarium://catalogs/crumb.unity/1.3.5/components
  • `circuitarium:

Read the thread · 2026-07-26 · closed · 1 comment

Good first issue: verify one real MCP host with the published package

Why this is useful

Circuitarium ships copyable configurations for several MCP hosts and executable checks for the configuration shapes. A sanitized report from one real host gives new users stronger evidence about the last mile from installation to tools/list without turning one vendor into the project contract.

Bounded scope

Choose one host currently documented in docs/client-setup.md (Codex, Claude Code/Desktop, VS Code, LM Studio, or Jan) and verify the published `circuitariu

Read the thread · 2026-07-29 · open · 0 comments

Good first issue: add a source-cited Logisim Probe component profile

Why this is useful

The 4.1.0 standard-library catalog names 169 built-in identities, while the curated neutral profiles intentionally cover only components whose behavior and ports have been source-cited. A single additional profile is a useful, reviewable contribution that improves model guidance without widening the simulator contract.

Bounded scope

Add one neutral profile for Logisim-evolution 4.1.0's Wiring / Probe component in src/domain/componentProfiles.ts.

The profile sho

Read the thread · 2026-07-29 · open · 0 comments

Build a golden cross-model MCP evaluation suite

Why

Circuitarium is intentionally model-neutral, but schemas that work for one frontier model can still confuse another model or a smaller local model. A reproducible evaluation suite should measure task success without checking proprietary designs into the repository.

Proposed scope

Create synthetic scenarios for:

  • capability discovery and project selection
  • component lookup, BOM, netlist, and ERC
  • clean vs failed vs inconclusive interpretation
  • digest conflict recovery
  • baseline

Read the thread · 2026-07-26 · open · 0 comments

Specify conversion-loss reports for cross-adapter import and export

Why

CRUMB, Logisim, HDL, SPICE, and future backends model different concepts. Conversion must never force unsupported semantics into the destination or hide what was dropped, approximated, renamed, or left unresolved.

Proposed scope

Define a versioned loss report consumed by future export.design and export.translate workflows.

Each entry should identify:

  • source entity and stable ID
  • destination capability or entity, when any
  • disposition (preserved, approximated, dropped

Read the thread · 2026-07-26 · open · 0 comments

CRUMBLE: add digest-guarded new-file-only crumb_apply_edit

Why

Once crumb_plan_edit has passed its evidence gates, Circuitarium needs a narrowly constrained apply operation that preserves unknown bytes and cannot silently mutate the wrong revision or overwrite a user’s design.

Required safety contract

  • Require the source digest and plan digest.
  • Permit only a new workspace-contained .cru destination.
  • Refuse existing destinations, symlink/junction escapes, stale plans, ambiguous spans, and unsupported operations.
  • Apply minimal non-over

Read the thread · 2026-07-26 · open · 0 comments

Most recent

CRUMBLE: expose a guarded crumb_plan_edit preview tool

Why

The private byte-preserving round-trip layer can support a safe public write arc only after operations are evidence-backed. Planning must remain separate from applying so a user/model can inspect exact intent, unsupported fields, and expected findings before any file is created.

Proposed scope

Start with the smallest operations that pass controlled CRUMB 1.3.5 reopen/resave evidence (for example rename, one typed scalar, move, or removal). The tool must not write.

Acceptance cri

Read the thread · 2026-07-26 · open · 0 comments

Define the Circuitarium portable project and neutral netlist IR v0.1

Why

Circuitarium currently has a neutral MCP envelope, but the richest design model is still CRUMBLE/CRUMB-specific. A versioned portable intermediate representation is the foundation for adding Logisim, conversion, simulation, and cross-adapter comparison without making one simulator’s format the source of truth.

Proposed scope

  • Define stable IDs for projects, hierarchical components, ports, nets, buses, parameters, and adapter evidence.
  • Represent firmware and other sensitive payloa

Read the thread · 2026-07-26 · open · 0 comments

The remaining reports are on the project's issue tracker.