fix(mcp): set_fields rejects reserved keys; add top-level description#158
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fix(mcp): set_fields rejects reserved keys; add top-level description#158
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⚠️ Performance Alert ⚠️
Possible performance regression was detected for benchmark 'Rivet Criterion Benchmarks'.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.20.
| Benchmark suite | Current: e27c388 | Previous: 2fafe1a | Ratio |
|---|---|---|---|
store_insert/100 |
80852 ns/iter (± 941) |
63420 ns/iter (± 225) |
1.27 |
store_insert/1000 |
843839 ns/iter (± 7447) |
678487 ns/iter (± 6153) |
1.24 |
store_insert/10000 |
14246431 ns/iter (± 928250) |
10919758 ns/iter (± 667589) |
1.30 |
store_lookup/100 |
2108 ns/iter (± 14) |
1482 ns/iter (± 2) |
1.42 |
store_lookup/1000 |
26832 ns/iter (± 129) |
18377 ns/iter (± 35) |
1.46 |
store_lookup/10000 |
371642 ns/iter (± 4805) |
269456 ns/iter (± 1380) |
1.38 |
store_by_type/100 |
95 ns/iter (± 0) |
75 ns/iter (± 0) |
1.27 |
store_by_type/1000 |
95 ns/iter (± 1) |
75 ns/iter (± 0) |
1.27 |
store_by_type/10000 |
96 ns/iter (± 0) |
75 ns/iter (± 0) |
1.28 |
schema_load_and_merge |
994937 ns/iter (± 19222) |
778867 ns/iter (± 8653) |
1.28 |
link_graph_build/100 |
165306 ns/iter (± 6419) |
127731 ns/iter (± 591) |
1.29 |
link_graph_build/1000 |
1940916 ns/iter (± 166295) |
1487602 ns/iter (± 11779) |
1.30 |
link_graph_build/10000 |
30886677 ns/iter (± 1725918) |
23876175 ns/iter (± 1828586) |
1.29 |
validate/100 |
113263 ns/iter (± 1151) |
83361 ns/iter (± 401) |
1.36 |
validate/1000 |
962329 ns/iter (± 3329) |
736705 ns/iter (± 4109) |
1.31 |
traceability_matrix/100 |
4247 ns/iter (± 18) |
3283 ns/iter (± 20) |
1.29 |
traceability_matrix/1000 |
60209 ns/iter (± 332) |
34852 ns/iter (± 112) |
1.73 |
traceability_matrix/10000 |
769677 ns/iter (± 2499) |
564717 ns/iter (± 4408) |
1.36 |
diff/100 |
62809 ns/iter (± 634) |
45470 ns/iter (± 175) |
1.38 |
diff/1000 |
682508 ns/iter (± 11172) |
500593 ns/iter (± 3865) |
1.36 |
diff/10000 |
7597362 ns/iter (± 241212) |
6107115 ns/iter (± 365890) |
1.24 |
query/100 |
808 ns/iter (± 2) |
564 ns/iter (± 13) |
1.43 |
query/1000 |
7418 ns/iter (± 62) |
5187 ns/iter (± 6) |
1.43 |
query/10000 |
110965 ns/iter (± 1645) |
69446 ns/iter (± 4127) |
1.60 |
document_parse/10 |
23575 ns/iter (± 177) |
16784 ns/iter (± 24) |
1.40 |
document_parse/100 |
165294 ns/iter (± 1234) |
114429 ns/iter (± 307) |
1.44 |
document_parse/1000 |
1523992 ns/iter (± 7257) |
1056989 ns/iter (± 13193) |
1.44 |
This comment was automatically generated by workflow using github-action-benchmark.
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…tion` setter
Two related MCP correctness bugs in `rivet_modify`:
1. `set_fields` silently wrote reserved top-level keys (description, title,
status, ...) under the `fields:` sub-map — corrupting the artifact's
shape. Values containing backticks or newlines additionally broke the
YAML emitter, which used unquoted `format!("{key}: {value}")` lines.
2. There was no way to set the top-level `description` (or other top-level
metadata) via MCP — `set_fields` was the only "generic setter" and, by
design, targets only the domain `fields:` map.
Design: keep `set_fields` scoped to the `fields:` sub-map and expose
dedicated setters for top-level metadata. `validate_modify` now rejects
any `set_fields` key listed in `RESERVED_TOP_LEVEL_KEYS` (id, type, title,
description, status, tags, links, fields, provenance, source-file) with a
hint pointing at the right parameter. A new `description` parameter on
`rivet_modify` routes through `ModifyParams::set_description`, which
emits YAML-safe scalars — multi-line values become block-literal (`|-`)
scalars, single-line values with YAML-significant characters are
double-quoted with proper escapes. `set_field` in the editor was extended
to splice multi-line values into the line buffer so block scalars stay
well-formed.
Tests (added failing first, now green):
- `test_set_fields_rejects_reserved_description` / `_all_reserved_top_level_keys`
- `test_modify_sets_top_level_description`
- `test_modify_description_with_backticks_and_newlines`
- `test_validate_modify_rejects_reserved_top_level_in_set_fields`
- `test_yaml_quote_inline_scalar_*`, `test_set_field_writes_*_as_*_scalar`
Fixes: REQ-002
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Two related MCP bugs
Bug 1 — `yaml_edit.rs::modify_artifact_yaml` unconditionally nested every `set_fields` key under `fields:` using `format!("{key}: {value}")`. Passing `description=...` wrote `fields: {description: ...}` instead of touching top-level, and raw-interpolation corrupted YAML when the value contained backticks or newlines.
Bug 2 — MCP `ModifyParams` exposed only `status`, `title`, `add_tags`, `remove_tags`, `set_fields`. Top-level `description` (and `source-file`, `provenance`, full tag replacement) were unreachable via MCP at all.
Fix
Test plan
Depends-on: #157 for clean main.rs merge.
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