## What
`generateToolMetrics` reads an enum parameter's values by unwrapping
**at most
one** `optional` wrapper:
```ts
if (schema._def.values?.length > 0) {
values = schema._def.values;
} else {
values = schema._def.innerType._def.values; // only one level
}
```
An enum parameter wrapped in `.default().optional()` (or any nested
`optional`/`default`/`nullable` combination) therefore falls through to
`schema._def.innerType._def.values === undefined`, and `npm run
update-metrics`
(run as part of `npm run gen`) crashes:
```
TypeError: Cannot read properties of undefined (reading '0')
at validateEnumHomogeneity (build/src/telemetry/metricsRegistry.js:12)
at generateToolMetrics (build/src/telemetry/metricsRegistry.js:59)
```
## Why it matters
`npm run gen` is required whenever a tool is added or changed (per
`CONTRIBUTING.md`). Declaring an enum parameter with a default — a
natural,
documented zod pattern — silently breaks docs/metrics generation.
## Fix
Add `getEnumValues()` in `transformation.ts` that recursively unwraps
`optional` / `default` / `nullable` / `effects` wrappers, mirroring the
existing
`getZodType()`, and use it in `generateToolMetrics`. Behavior is
unchanged for
the existing bare-enum and single-`optional` cases.
## Tests
- `getEnumValues` unit tests: bare enum, `optional`, `default`, both
orders of
`default`+`optional`, and throws for a non-enum type.
- `generateToolMetrics` regression test with
`zod.enum(...).default(...).optional()`.
- `npm run typecheck`, the telemetry tests, and `npm run check-format`
pass.
---
First-time contributor here — happy to sign the CLA.
Underscore followed by numbers is not encouraged in the proto style
guide. See "Underscores in Identifiers" in
https://protobuf.dev/programming-guides/style/.
This recently became an issue because we have `list_3p_developer_tools`
and `execute_3p_developer_tool` which would have been dis-allowed. This
change replaces them with `list3p_developer_tools` and
`execute3p_developer_tool` respectively, as suggested by the style
guide.
This only affects the logged version. The tool name is still the
existing one.
This transformation is also applied to other similar places, like flag
names, tool name in error logging, and tool args.
The `tool_name_metrics.json` was manually updated because we never
landed the server side change because it was disallowed by proto style
check.
There is no behavior change.
This groups utilities into two modules:
- `transformation.ts`: for any logic related to mutating / filtering of
the names, values of telemetry entries.
- `metricsRegistry.ts`: for any logic that related to the maintenance of
metrics.json files.
Liohtml