refactor(gitea-labels-milestones): retrofit to the ADR-0020 context contract

Description 835 -> 214 chars, body 669 -> 426 words, Gotchas 8 entries/63% of
body -> 3/20.4%. Clears the description FAIL, all three Vale CompositionNote
errors and both Gotchas suggestions. 63% was the worst Gotchas ratio in the
corpus.

Cut the composition sentence to README -- it changes no routing decision and an
agent picks this skill because the user asked about labels, not because two
other skills call it. Cut the capability enumeration; 'list, create, edit,
delete' decompose 'reading or writing' and add no trigger.

Boundary clauses are now one arrow per target. The resolver extracts only the
first name per arrow clause, so the previous '-> gitea-issues / gitea-prs' left
gitea-prs neither dangling nor checked while validate.sh reported 1 of 1. Now
2 of 2.

Makes org-scoped label resolution executable. The org label pool was reachable
in principle -- four *_org_label* methods, and a claim to own name-to-ID
resolution -- but list_org_labels takes org, and Step 1 derived only owner and
repo, so both resolution procedures stalled at the fallback. Fixed once at the
identity step rather than per-procedure. get_user_orgs is outside allowed-tools,
so the failing call is the discriminator: a failure means the owner is a user
account with no org pool, which is an answer, not an error.

Corrects a Gotcha that was false for create_repo_label/create_org_label and
collided with the literal tool name label_write. Same false claim removed from
README.

Refs #99

plugins/gitea/.apm/skills/gitea-labels-milestones/SKILL.md

@@ -2,15 +2,9 @@
 name: gitea-labels-milestones
 
 description: >
-  Use when reading or writing Gitea labels or milestones — listing repo/org labels, creating,
-  editing, or deleting a label, resolving label names to the numeric IDs required for applying
-  them to an issue or PR, or listing, creating, updating, closing, or deleting a milestone. This is
-  a cross-cutting shared skill: `gitea-issues` and `gitea-prs` both compose it whenever they need to
-  apply labels or assign a milestone, rather than duplicating label/milestone logic. Also use for
-  label inference — mapping a bug report, feature request, or urgency signal in conversation
-  context to the repo's `Kind/*`/`Priority/*`/`Status/*` label taxonomy. Do not use for applying
-  already-resolved label IDs or milestone IDs to a specific issue or PR — that write goes through
-  `issue_write`/`pull_request_write` in `gitea-issues`/`gitea-prs`, not here.
+  Use when reading or writing Gitea labels or milestones — resolve names to IDs, or infer
+  labels — even when the user does not say "Gitea".
+  Not applying them to an issue -> `gitea-issues`. Not to a PR -> `gitea-prs`.
 
 compatibility: Requires Gitea MCP server configured with write:issue and write:repository token scopes.
 
@@ -21,23 +15,18 @@ metadata:
     - gitea-mcp-slim-go
     - context7-websites-gitea
     - context7-gitea-tea-cli
-  version: "0.1.1"
+  version: "0.1.4"
 
 allowed-tools: Bash mcp__gitea__label_read mcp__gitea__label_write mcp__gitea__milestone_read mcp__gitea__milestone_write
 ---
 
 ## Gotchas
 
-- **Label writes take IDs, reads return names.** `label_read` is the only tool that returns full label objects (`id`, `name`, `color`, `description`). Issue/PR responses slim labels down to name strings. Before any label is applied to an issue or PR (in `gitea-issues`/`gitea-prs`), resolve names → IDs here via `label_read method: "list_repo_labels"` — never pass a name string where an ID is expected.
-- **Milestones are referenced by ID everywhere, never by title.** `milestone_write` update/delete take `id`. The one place titles show up as the sole handle is the `pull_request_read` response (see next gotcha).
-- **Milestone representation differs between issues and PRs.** `issue_read` returns `milestone: {id, title}` — an object. `pull_request_read` returns `milestone: "title string"` — title only, no ID. You cannot recover a milestone ID from a PR response directly; call `milestone_read method: "list"` and match by title instead.
-- **Repo labels and org labels are separate pools, never mixed in one call.** `label_read`/`label_write` take either `owner`+`repo` (repo-scoped methods) or `org` (org-scoped methods) — passing both or neither for a given method is a caller error, not something the schema enforces for you. Repo and org labels can both apply to the same issue, but you list/create/edit them through different method values.
-- **`milestone_write` accepts `"update"` and `"edit"` as the same operation.** Both method values map to the identical update call. Prefer `"update"` for consistency with `issue_write`/`pull_request_write`.
-- **`exclusive` is documented as an org-labels-only flag — it isn't what enforces exclusivity here.** Gitea's docs scope the settable/server-enforced `exclusive` flag to org labels only, and the live `label_write` schema for `create_repo_label`/`edit_repo_label` doesn't document accepting it at all. This repo's `Kind/*`, `Priority/*`, `Status/*` groups still behave as one-label-per-scope, but that's a manually-enforced convention this skill implements client-side, not a guaranteed server behavior for repo labels: applying a new label within a scope (e.g. `Priority/High`) must replace any existing label in that same scope, not add alongside it, and nothing on the server enforces that for you. Label inference (see `references/label-inference.md`) must respect this — replace, don't stack.
-- **Pagination is manual on every list call.** `label_read` and `milestone_read` both default to `per_page: 30`. Iterate `page: 1, 2, ...` until the result count is less than `per_page` — there is no cursor or auto-pagination.
-- **Schema requiredness differs between the two tool families.** `milestone_read`/`milestone_write` have `owner` and `repo` as hard-required parameters (the call fails validation without them). `label_read`/`label_write` only hard-require `method` — `owner`/`repo`/`org` are functionally required per method but not schema-enforced, so passing none produces a runtime error from Gitea, not a client-side validation error.
+- **Applying a label takes a numeric ID, but issue/PR responses slim labels down to name strings.** An issue's existing labels yield no IDs — resolve name → ID with `label_read`.
+- **`pull_request_read` returns `milestone` as a bare title string** where `issue_read` returns `{id, title}` — recover the milestone's ID by listing milestones and matching the title.
+- **`Kind/*`/`Priority/*`/`Status/*` exclusivity is a client-side convention.** `exclusive` is an org-labels-only flag, so applying a label in such a scope must replace the one already there, not stack on it.
 
-## Step 1 — Resolve owner and repo
+## Step 1 — Resolve owner, repo and org
 
 Before any tool call, extract `owner` and `repo` from the git remote (skip this if an orchestrating caller already passed them in):
 
@@ -47,10 +36,13 @@ git remote get-url origin
 
 If origin is not set or the URL is not a Gitea URL, stop and report: "No Gitea remote found — set origin to your Gitea instance URL."
 
+The `*_org_label*` methods take `org`, not `owner`/`repo`. Pass that same `owner` as `org` — it is the org name whenever the owner is an organisation, and the remote URL does not say whether it is one. So let the call itself decide: a failure means the owner is a user account with no org label pool, which is an answer, not an error to report.
+
 ## Step 2 — Dispatch
 
 | Task | Tool | method |
 |---|---|---|
+| Resolve a label name to its ID | `label_read` | `"list_repo_labels"`, then `"list_org_labels"` |
 | List repo labels | `label_read` | `"list_repo_labels"` |
 | Get one repo label by ID | `label_read` | `"get_repo_label"` |
 | List org labels | `label_read` | `"list_org_labels"` |
@@ -63,6 +55,6 @@ If origin is not set or the URL is not a Gitea URL, stop and report: "No Gitea r
 | Update / close a milestone | `milestone_write` | `"update"` |
 | Delete a milestone | `milestone_write` | `"delete"` |
 
-For full parameter detail and step-by-step call sequences, read `references/labels.md` (label operations) or `references/milestones.md` (milestone operations). For mapping conversation context to a label to apply, read `references/label-inference.md`.
+Every list method paginates manually — `per_page` defaults to 30, so iterate `page: 1, 2, ...` until a page returns fewer results than `per_page`. A truncated list silently breaks name → ID resolution.
 
-Applying resolved label IDs or a milestone ID to a specific issue or PR is out of scope here — that's `issue_write`/`pull_request_write` in the composing skill (`gitea-issues`/`gitea-prs`).
+If the task is a label operation, read `references/labels.md`; if a milestone operation, read `references/milestones.md`. If the label to apply has to be derived from conversation context rather than named, read `references/label-inference.md`.