Filing + Phase 1 fix in one commit (sibling of #143).
## Context
With #143 Phase 1 landed (`claw status` degrades), `claw mcp` was the
remaining diagnostic surface that hard-failed on a malformed `.claw.json`.
Same input, same parse error, same partial-success violation. Fresh
dogfood at 18:59 KST caught it on main HEAD `e2a43fc`.
## Changes
### ROADMAP.md
Added Pinpoint #144 documenting the gap and acceptance criteria. Joins
the partial-success / Principle #5 cluster with #143.
### rust/crates/commands/src/lib.rs
`render_mcp_report_for()` + `render_mcp_report_json_for()` now catch the
ConfigError at loader.load() instead of propagating:
- **Text mode** prepends a "Config load error" block (same shape as
#143's status output) before the MCP listing. The listing still renders
with empty servers so the output structure is preserved.
- **JSON mode** adds top-level `status: "ok" | "degraded"` +
`config_load_error: string | null` fields alongside existing fields
(`kind`, `action`, `working_directory`, `configured_servers`,
`servers[]`). On clean runs, `status: "ok"` and
`config_load_error: null`. On parse failure, `status: "degraded"`,
`config_load_error: "..."`, `servers: []`, exit 0.
- Both list and show actions get the same treatment.
### Regression test
`commands::tests::mcp_degrades_gracefully_on_malformed_mcp_config_144`:
- Injects the same malformed .claw.json as #143 (one valid + one broken
mcpServers entry).
- Asserts mcp list returns Ok (not Err).
- Asserts top-level status: "degraded" and config_load_error names the
malformed field path.
- Asserts show action also degrades.
- Asserts clean path returns status: "ok" with config_load_error null.
## Live verification
$ claw mcp --output-format json
{
"action": "list",
"kind": "mcp",
"status": "degraded",
"config_load_error": ".../.claw.json: mcpServers.missing-command: missing string field command",
"working_directory": "/Users/yeongyu/clawd",
"configured_servers": 0,
"servers": []
}
Exit 0.
## Contract alignment after this commit
All three diagnostic surfaces match now:
- `doctor` — degraded envelope with typed check entries ✅
- `status` — degraded envelope with config_load_error ✅ (#143)
- `mcp` — degraded envelope with config_load_error ✅ (this commit)
Phase 2 (typed-error object joining taxonomy §4.44) tracked separately
across all three surfaces.
Full workspace test green except pre-existing resume_latest flake (unrelated).
Closes ROADMAP #144 phase 1.
faeaa1d30c