fix(gitea): correct which pull_request_write params apply on create

The gitea-prs reference documented `milestone` as "settable on both
"create" and "update"". It is not: `pull_request_write method: "create"`
accepts the parameter, returns no error or warning, and discards it.

Verified against the gitea-mcp v1.6.0 source rather than by observation
alone. `createPullRequestFn` builds its `CreatePullRequestOption` from
owner, repo, title, body, head, base, draft, labels and deadline only —
so the drop is not limited to `milestone` as issue #104 supposed.
`assignee`, `assignees`, `reviewers` and `team_reviewers` are discarded
on create too, and `reviewers`/`team_reviewers` are discarded on
"update" as well; they are only ever read by "add_reviewers" and
"remove_reviewers".

Two properties made the original error easy to make and hard to catch,
so both are now written down next to the correction: `labels` sits
beside `milestone`, reads identically, and does apply on create; and
`issue_write method: "create"` honours `assignees` and `milestone`, so
the asymmetry is specific to pull requests.

While in the file, corrected the adjacent draft gotcha. It prescribed
reconstructing the un-prefixed title by hand to un-draft a PR;
`applyDraftPrefix` shows "update" with `draft: false` and no `title`
fetches the stored title and strips the prefix server-side.

Impact: documentation only, no behaviour change. Callers following the
old text silently created PRs with no milestone, assignee or reviewer.
Confined to references/pull-requests.md, so the ADR-0020 skill gates do
not apply and gitea-prs needs no #99 retrofit first.

Fixes: #104
Refs: #99

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01ETxbGFetkbJQBHsx442Brt

plugins/gitea/.apm/skills/gitea-prs/references/pull-requests.md

@@ -41,7 +41,7 @@ List responses trim PRs down to summary fields — `head`/`base` are bare ref st
 - `"get_files"` returns the list of changed file objects.
 - `"get_status"` returns the combined commit status for the PR's head commit — CI result only, not review/approval state (see `references/merging.md`).
 
-**Milestone gotcha:** because `pull_request_read` only ever returns a milestone title, never an ID, resolving "which milestone ID does this PR belong to" requires calling into `gitea-labels-milestones`' `milestone_read method: "list"` and matching by title. Do not attempt to infer or guess the ID.
+**Milestone gotcha:** because `pull_request_read` only ever returns a milestone title, never an ID, resolving "which milestone ID does this PR belong to" requires calling into `gitea-labels-milestones`' `milestone_read method: "list"` and matching by title. Do not attempt to infer or guess the ID. This is the read-side milestone problem; for the separate write-side one, see the `"create"` drop Gotcha under `pull_request_write`.
 
 ## `pull_request_write`
 
@@ -54,22 +54,31 @@ List responses trim PRs down to summary fields — `head`/`base` are bare ref st
 - `body` (string, required for `"create"`; optional for `"update"`)
 - `head` (string, required for `"create"`) — source branch; same-repo PRs use a bare branch name, cross-repo fork PRs use `"fork-owner:branch-name"` (see Gotcha)
 - `base` (string, required for `"create"`) — target branch
-- `assignee` (string, optional) — single login
-- `assignees` (array of strings, optional) — login names
-- `milestone` (number, optional) — milestone ID, never a title; settable on both `"create"` and `"update"`
+- `assignee` (string, optional) — single login; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
+- `assignees` (array of strings, optional) — login names; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
+- `milestone` (number, optional) — milestone ID, never a title; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
 - `state` (string, optional, for `"update"`) — `"open"` | `"closed"` (no `"all"` — unlike issue state filters)
 - `allow_maintainer_edit` (boolean, optional, for `"update"`)
 - `labels` (array of numbers, optional) — label IDs, never names — resolve via `gitea-labels-milestones` first
 - `deadline` (string, optional) — ISO 8601
 - `remove_deadline` (boolean, optional)
-- `reviewers` (array of strings, optional) — login names; settable directly on `"create"`, or use `"add_reviewers"`/`"remove_reviewers"` to adjust reviewers on an already-open PR
-- `team_reviewers` (array of strings, optional) — same as `reviewers`: settable on `"create"`, or via `"add_reviewers"`/`"remove_reviewers"` post-creation
-- `draft` (boolean, optional, for `"create"`) — prepends `"WIP:"` to the title (see Gotcha)
+- `reviewers` (array of strings, optional) — login names; **`"add_reviewers"`/`"remove_reviewers"` only** — silently dropped on both `"create"` and `"update"` (see Gotcha)
+- `team_reviewers` (array of strings, optional) — same as `reviewers`: `"add_reviewers"`/`"remove_reviewers"` only
+- `draft` (boolean, optional) — prepends `"WIP:"` to the title; honoured on both `"create"` and `"update"` (see Gotcha)
 
 Merge-specific parameters (`merge_style`, `delete_branch`, `force_merge`, `merge_when_checks_succeed`, `head_commit_id`, `message` as merge commit message) are covered in `references/merging.md`.
 
+**`"create"` silently drops most optional parameters.** `"create"` reads only `owner`, `repo`, `title`, `body`, `head`, `base`, `draft`, `labels`, and `deadline`. Every other optional parameter — `assignee`, `assignees`, `milestone`, `reviewers`, `team_reviewers` — is accepted without error and discarded. There is no error, no warning, and nothing in the response distinguishing a dropped parameter from one that was never passed: the response simply omits the key. Setting any of them requires a second call after the PR exists — `"update"` for `assignee`/`assignees`/`milestone`, `"add_reviewers"` for `reviewers`/`team_reviewers`.
+
+Two things make this easy to miss:
+
+- **`labels` does apply on `"create"`.** It sits next to `milestone` in the parameter list and reads identically, so a caller who confirms the labels landed will reasonably assume the milestone did too.
+- **`issue_write method: "create"` does honour `assignees` and `milestone`.** The asymmetry is specific to pull requests; experience with the issue write does not transfer.
+
+To verify a milestone actually applied, re-read the PR and check for the `milestone` key, or check that the milestone's `open_issues` count moved — the create response alone cannot tell you.
+
 **Cross-repo head format:** `head` must be `"fork-owner:branch-name"` for a PR originating from a fork of the base repo. Passing a bare branch name causes Gitea to search for that branch in the base repo instead, and returns 422 when it isn't found there.
 
-**Draft/WIP behavior:** `draft: true` on `"create"` is implemented by prepending `"WIP:"` to the title — there is no first-class draft boolean stored separately from the title. The title returned by subsequent reads will include the prefix. To un-draft, call `"update"` with `title` set to the same text minus the `"WIP:"` prefix; there is no dedicated undraft method.
+**Draft/WIP behavior:** `draft: true` on `"create"` is implemented by prepending `"WIP:"` to the title — there is no first-class draft boolean stored separately from the title. The title returned by subsequent reads will include the prefix. To un-draft, call `"update"` with `draft: false` and no `title` — the server reads the PR's current title and strips the prefix itself, so you do not need to reconstruct the un-prefixed text. Passing `title` alongside `draft` applies the prefix rule to the title you passed rather than the stored one.
 
 **`update_branch`:** takes only `owner`, `repo`, `pull_number` — no other parameters. It merges the current base branch into the PR's head branch server-side, resolving a PR that Gitea reports as behind its base (analogous to GitHub's "Update branch" button). Use it when a PR shows `mergeable: false` or an out-of-date status due to base-branch drift rather than an actual conflict; if the head and base have truly diverged with conflicting changes, this call fails and the conflict must be resolved by pushing a merge/rebase to the head branch directly, outside this skill's scope.

plugins/gitea/skills/gitea-prs/references/pull-requests.md

@@ -41,7 +41,7 @@ List responses trim PRs down to summary fields — `head`/`base` are bare ref st
 - `"get_files"` returns the list of changed file objects.
 - `"get_status"` returns the combined commit status for the PR's head commit — CI result only, not review/approval state (see `references/merging.md`).
 
-**Milestone gotcha:** because `pull_request_read` only ever returns a milestone title, never an ID, resolving "which milestone ID does this PR belong to" requires calling into `gitea-labels-milestones`' `milestone_read method: "list"` and matching by title. Do not attempt to infer or guess the ID.
+**Milestone gotcha:** because `pull_request_read` only ever returns a milestone title, never an ID, resolving "which milestone ID does this PR belong to" requires calling into `gitea-labels-milestones`' `milestone_read method: "list"` and matching by title. Do not attempt to infer or guess the ID. This is the read-side milestone problem; for the separate write-side one, see the `"create"` drop Gotcha under `pull_request_write`.
 
 ## `pull_request_write`
 
@@ -54,22 +54,31 @@ List responses trim PRs down to summary fields — `head`/`base` are bare ref st
 - `body` (string, required for `"create"`; optional for `"update"`)
 - `head` (string, required for `"create"`) — source branch; same-repo PRs use a bare branch name, cross-repo fork PRs use `"fork-owner:branch-name"` (see Gotcha)
 - `base` (string, required for `"create"`) — target branch
-- `assignee` (string, optional) — single login
-- `assignees` (array of strings, optional) — login names
-- `milestone` (number, optional) — milestone ID, never a title; settable on both `"create"` and `"update"`
+- `assignee` (string, optional) — single login; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
+- `assignees` (array of strings, optional) — login names; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
+- `milestone` (number, optional) — milestone ID, never a title; **`"update"` only** — silently dropped on `"create"` (see Gotcha)
 - `state` (string, optional, for `"update"`) — `"open"` | `"closed"` (no `"all"` — unlike issue state filters)
 - `allow_maintainer_edit` (boolean, optional, for `"update"`)
 - `labels` (array of numbers, optional) — label IDs, never names — resolve via `gitea-labels-milestones` first
 - `deadline` (string, optional) — ISO 8601
 - `remove_deadline` (boolean, optional)
-- `reviewers` (array of strings, optional) — login names; settable directly on `"create"`, or use `"add_reviewers"`/`"remove_reviewers"` to adjust reviewers on an already-open PR
-- `team_reviewers` (array of strings, optional) — same as `reviewers`: settable on `"create"`, or via `"add_reviewers"`/`"remove_reviewers"` post-creation
-- `draft` (boolean, optional, for `"create"`) — prepends `"WIP:"` to the title (see Gotcha)
+- `reviewers` (array of strings, optional) — login names; **`"add_reviewers"`/`"remove_reviewers"` only** — silently dropped on both `"create"` and `"update"` (see Gotcha)
+- `team_reviewers` (array of strings, optional) — same as `reviewers`: `"add_reviewers"`/`"remove_reviewers"` only
+- `draft` (boolean, optional) — prepends `"WIP:"` to the title; honoured on both `"create"` and `"update"` (see Gotcha)
 
 Merge-specific parameters (`merge_style`, `delete_branch`, `force_merge`, `merge_when_checks_succeed`, `head_commit_id`, `message` as merge commit message) are covered in `references/merging.md`.
 
+**`"create"` silently drops most optional parameters.** `"create"` reads only `owner`, `repo`, `title`, `body`, `head`, `base`, `draft`, `labels`, and `deadline`. Every other optional parameter — `assignee`, `assignees`, `milestone`, `reviewers`, `team_reviewers` — is accepted without error and discarded. There is no error, no warning, and nothing in the response distinguishing a dropped parameter from one that was never passed: the response simply omits the key. Setting any of them requires a second call after the PR exists — `"update"` for `assignee`/`assignees`/`milestone`, `"add_reviewers"` for `reviewers`/`team_reviewers`.
+
+Two things make this easy to miss:
+
+- **`labels` does apply on `"create"`.** It sits next to `milestone` in the parameter list and reads identically, so a caller who confirms the labels landed will reasonably assume the milestone did too.
+- **`issue_write method: "create"` does honour `assignees` and `milestone`.** The asymmetry is specific to pull requests; experience with the issue write does not transfer.
+
+To verify a milestone actually applied, re-read the PR and check for the `milestone` key, or check that the milestone's `open_issues` count moved — the create response alone cannot tell you.
+
 **Cross-repo head format:** `head` must be `"fork-owner:branch-name"` for a PR originating from a fork of the base repo. Passing a bare branch name causes Gitea to search for that branch in the base repo instead, and returns 422 when it isn't found there.
 
-**Draft/WIP behavior:** `draft: true` on `"create"` is implemented by prepending `"WIP:"` to the title — there is no first-class draft boolean stored separately from the title. The title returned by subsequent reads will include the prefix. To un-draft, call `"update"` with `title` set to the same text minus the `"WIP:"` prefix; there is no dedicated undraft method.
+**Draft/WIP behavior:** `draft: true` on `"create"` is implemented by prepending `"WIP:"` to the title — there is no first-class draft boolean stored separately from the title. The title returned by subsequent reads will include the prefix. To un-draft, call `"update"` with `draft: false` and no `title` — the server reads the PR's current title and strips the prefix itself, so you do not need to reconstruct the un-prefixed text. Passing `title` alongside `draft` applies the prefix rule to the title you passed rather than the stored one.
 
 **`update_branch`:** takes only `owner`, `repo`, `pull_number` — no other parameters. It merges the current base branch into the PR's head branch server-side, resolving a PR that Gitea reports as behind its base (analogous to GitHub's "Update branch" button). Use it when a PR shows `mergeable: false` or an out-of-date status due to base-branch drift rather than an actual conflict; if the head and base have truly diverged with conflicting changes, this call fails and the conflict must be resolved by pushing a merge/rebase to the head branch directly, outside this skill's scope.