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Nick Vigilante 2e0f97e5de feat: add type and secret status to the configuration reference (DOCS-896) (#29310)
## Summary

The generated configuration reference told a reader how to set each
deployment option but not what the option accepts. Every entry carried
the environment variable, CLI flag, YAML key, and default, while
serpent's value type stayed in the source. A reader could not tell a
`duration` from an `int`, or discover an enum's accepted values, without
following the flag link into the CLI reference.

- **Type** is now rendered for all 200 options from the serpent value.
Enums expand into their choices (`- Type: `enum`, one of `password`,
`awsiamrds``) rather than printing serpent's escaped `enum[a\|b]`
spelling, which is meant for its own table output.
- **Secrets** are now marked. The nine options carrying the `secret`
annotation that `codersdk.IsSecretDeploymentOption` reads are
deliberately excluded from YAML, so the page now says where to set them
instead of leaving the omission unexplained.

## Correction to the issue

DOCS-896 claimed the page showed a YAML key for secret options. It does
not: all nine secret options have an empty `YAML` field, so the
generator already omitted that bullet. The real gap was that nothing
explained *why* the YAML key is missing. The page header and the
per-option marker now cover it.

## Verification

- `go test ./scripts/configdocgen` passes, with new cases for the
enum-choice parsing, plain and nil value types, and the secret marker
rendering exactly once for the annotated option.
- Regenerated page has 200 `- Type:` lines for 200 rendered options and
9 secret markers.
- `make lint/emdash`, markdownlint, `markdown-table-formatter`, and Vale
are clean on the regenerated page. `golangci-lint` clean on the package.
Full `make pre-commit` passed.

<details>
<summary>Local pre-push note</summary>

The repository pre-push hook runs the full Go suite locally. In this
workspace it segfaults the `make` process outright, and an isolated
`make test` run produces ~1,000 failures unrelated to this change
(embedded NATS servers failing to start within 10s, chatd state-machine
tests), which reproduce independently of this diff. I verified the
change with `go build ./...`, the package tests above, and the full
pre-commit suite instead, and disabled the hook for this worktree only
using its documented `git config coder.pre-push` knob, restoring the
setting immediately after the push. No `--no-verify`. CI is the
authority on the full suite here.

</details>

---

Generated with Coder Agents on behalf of @nickvigilante. Linear:
[DOCS-896](https://linear.app/codercom/issue/DOCS-896/configdocgen-render-option-type-and-secret-status)
2026-10-01 16:50:42 -04:00
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