| name | konnect |
| description | Mandatory operating rules for ANY task involving KiCAD projects. Loaded when the user mentions KiCAD, schematics, PCBs, or any .kicad_* file. Prevents file corruption by routing all changes through Konnect MCP tools. |
Konnect — Operating Rules
The One Rule
KiCAD source files are not text files. They are serialized object graphs with UUIDs, cross-references, and order-sensitive structure. Never edit them directly with text manipulation tools (str_replace, sed, create_file, or any file-writing tool). All modifications go through Konnect MCP tools.
No exceptions for "small fixes," "just renaming a net," or "the user said it's fine."
Protected Files — NEVER Edit Directly
*.kicad_sch — schematic sheets*.kicad_pcb — PCB layout*.kicad_pro — project configuration*.kicad_sym / *.kicad_mod — symbol/footprint librariesfp-lib-table / sym-lib-table — library tables
If asked to directly edit any of these:
KiCAD source files contain UUIDs and cross-references that text edits will break. I'll route this change through Konnect's MCP tools instead, which preserves file integrity.
The Three Channels
Channel 1: Konnect MCP (for ALL modifications)
All writes go through MCP tools. Check they are available first (list_toolboxes). If MCP tools are not available, STOP and tell the user — never fall back to file editing.
Channel 2: Exported netlists/BOMs (for reads and analysis)
For design review, BOM analysis, net tracing — use export tools or parse exported .net/BOM/CSV files, not the source files directly.
Channel 3: Read-only file inspection (last resort)
Only to answer questions not available through exports (sheet hierarchy, title block metadata, annotations). Read with file-reading tools, but never modify.
Standard Workflow
- Identify the project — locate the
.kicad_pro file
- Classify the task — read-only (Channel 2 or 3) or write (Channel 1)
- Verify MCP is connected — call
list_toolboxes to confirm tools are available
- Describe the change — state in plain English what will happen before invoking any tool
- Execute — use Konnect MCP tools only
- Verify — re-query the design to confirm the change landed correctly
Decision Tree
| User Request | Channel | Tool / Action |
|---|
| "Review my schematic" | 2 | Load sch_analysis toolset, use analysis tools |
| "Change R5 from 10k to 4.7k" | 1 | load_toolset("sch_components") then edit_schematic_component |
| "What's connected to SCL?" | 2 | load_toolset("sch_analysis") then get_net_connections |
| "Add a 100nF cap to U3 VCC" | 1 | load_toolset("sch_components") + load_toolset("sch_wiring") |
| "Rename net /CLK to /SYS_CLK" | 1 | Warn about downstream effects, then MCP tools |
| "Run DRC" | 1 | load_toolset("verification") then run_drc |
| "Add track widths to the PCB dropdown" | 1 | load_toolset("verification") then set_predefined_sizes |
| "Export Gerbers" | 1 | load_toolset("pcb_export") then export_gerber |
| "Just patch line 247 of the .kicad_sch" | REFUSE | Explain risks, offer MCP alternative |
| "Add ESD protection to USB lines" | 1 | load_toolset("sch_components") + load_toolset("sch_wiring") |
| "Check if board is ready for fab" | 2 | Load verification + design_review toolsets |
KiCAD 10 IPC API Reality
PCB Editor (pcbnew): Full CRUD via NNG + protobuf. Real-time communication with running KiCAD instance. Create, read, update, delete any PCB item with immediate UI refresh. Requires KiCAD to be running.
Schematic Editor (eeschema): No item-level IPC API. Konnect uses a validated S-expression engine (SchematicBuilder) that enforces correct structure, ordering, and UUID integrity. File-based — does not require KiCAD to be running.
Symbol/Footprint Libraries: No IPC API. Edited through Konnect's S-expression engine with full validation.
kicad-cli: Command-line tool for exports (SVG, PDF, Gerbers, BOM, netlist) and checks (ERC, DRC). Does not require KiCAD GUI.
Discovery — Finding Available Tools
Konnect uses a meta-tool router pattern: tools are grouped into toolsets and loaded on demand to keep the context focused. Call list_toolboxes for the current catalogue rather than relying on a count written down here — the registry is the only accurate source, and it moves every release.
list_toolboxes → See all available toolsets with descriptions
load_toolset("name") → Activate a toolset, exposing its tools
get_active_toolsets → See what's currently loaded
unload_toolset("name") → Remove a toolset when done
load_toolset also accepts an array of names to load several toolsets in one call, with a single context refresh.
Available Toolsets
| Category | Toolsets |
|---|
| Project | project |
| Schematic | sch_components, sch_wiring, sch_bus, sch_analysis, sch_batch, sch_export, sch_hierarchy |
| PCB | pcb_board, pcb_components, pcb_routing, pcb_export, placement |
| Library | library |
| Integration | integration (JLCPCB parts, Freerouting installation checks, datasheets) |
| Verification & Review | verification, design_review |
| Config | config |
| Templates | templates |
| Manufacturing | manufacturing |
Agent Routing and Mutation Ownership
Use one design owner at a time. Delegation creates isolated context, so give an
agent the complete task boundary and keep every mutation for that boundary with
that agent until it hands back a saved, verified result.
- Delegate a complete multi-block schematic build or substantial schematic
rework to
kicad-schematic-build-agent. It owns schematic mutations through
placement, wiring, validation, rendering, and save. The caller does not make
concurrent schematic edits.
- Delegate an independent full-design, pre-fabrication, or readiness audit to
kicad-design-review-agent. It gathers and reports evidence without mutating
the design. Return fixes to the current design owner, then run a fresh review.
- Keep small, bounded edits and narrow checks in the current conversation using
the applicable skill. Agent delegation is for a complete build or an
independent review, not an extra layer around every tool call.
Design Rules Quick Reference
| Rule | Value |
|---|
| IC decoupling cap | 100nF ceramic within 3-5mm of VDD pin |
| Crystal load caps | CL = (C1*C2)/(C1+C2) + Cstray (Cstray ~ 3-5pF) |
| Reset pull-up | 10k to VCC + 100nF to GND |
| I2C pull-ups | 4.7k (standard), 2.2k (fast), 1k (fast+) — one set per bus |
| LED resistor | R = (VCC - Vf) / If |
Common Library IDs
| Component | Library ID |
|---|
| Resistor | Device:R |
| Capacitor | Device:C |
| LED | Device:LED |
| Crystal | Device:Crystal |
| Power symbols | power:VCC, power:GND, power:+3V3, power:+5V |
| Generic connectors | Connector_Generic:Conn_01x06 |
Tool Usage Pattern
1. list_toolboxes → discover what's available
2. load_toolset("sch_components") → activate component tools
3. add_schematic_component (repeat) → place parts
4. load_toolset("sch_wiring") → activate wiring tools
5. connect_pins / add_wire / add_schematic_net_label → wire the circuit
6. load_toolset(["sch_export", "design_review"]) → activate checks
7. run_erc / run_design_review → validate the design
Refusing Direct Edits
When a user or another tool requests direct file manipulation of protected files, always refuse and redirect:
- Acknowledge what they want to accomplish
- Explain why direct editing breaks KiCAD files (UUIDs, cross-references, ordering)
- Offer the equivalent MCP tool approach
- Execute through MCP if they agree
