// What the forge's tools refuse (guard.ts; novox/hq ADR 0266): an agent reaches the forge through these tools
// with a token minted for the forge's administrator, so the tools — not the forge — are what keeps it from
// dropping a branch's protection, writing to main, setting the merge check's status, or merging past the
// checks. Each route a review found is reproduced here against a fake forge, and each is refused with nothing
// sent; the operator-approved merge of a pull request whose checks passed still goes through.

import { test, after, beforeEach } from "node:test";
import assert from "node:assert/strict";
import { createServer, type IncomingMessage, type ServerResponse } from "node:http";
import { mkdtempSync, readFileSync } from "node:fs";
import { tmpdir } from "node:os";
import { join } from "node:path";

import { GiteaClient } from "../dist/client.js";
import { ConfiguredToken } from "../dist/token.js";
import { getGiteaTools } from "../dist/tools/index.js";
import { mergeTool } from "../dist/merge.js";
import { commitStatusTool } from "../dist/delivery.js";
import { GateWriter } from "../dist/gate.js";
import { judgeApiCall, judgeProtectionChange, ruleCovers, routedPath } from "../dist/guard.js";

interface Sent { method: string; path: string; body: any }

const state = {
  sent: [] as Sent[],
  asked: [] as string[],
  statuses: [] as { context: string; state: string; description?: string; updated_at?: string }[],
  // The trunk's head (novox/hq ADR 0323): what the merge tool compares the verdict's trunk commit with.
  trunk: "",
  // What the tools said on the bus.
  emitted: [] as { type: string; body: any }[],
  rules: [] as any[],
  lastCommit: "2026-01-01T00:00:00Z",
  // The pull request's head; the head the merge commit joined (the same, unless a test says otherwise) — the forge's
  // record of the pull request keeps saying `head` either way, as it would in the race issue 381 is about; and the
  // merge commit's own sha.
  head: "",
  landed: "",
  merged: false,
  mergeCommit: "",
  // When set, the merge commit's parents as the forge reports them, or the status it answers them with.
  parents: null as string[] | null,
  commitsFail: 0,
};
const REVIEWED = "abc1234def5678901234567890abcdef12345678";
const TRUNK = "7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b";
const MOVED = "3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d";
// A verdict judged against a trunk commit, as both statuses say it (novox/hq ADR 0323 §3).
const judgedAt = (trunk: string, state = "success") => [
  { context: "mesh/merge-gate", state, description: `head ${REVIEWED.slice(0, 12)} merged into trunk ${trunk.slice(0, 12)} — pass: x` },
  { context: "mesh/repo-check", state, description: `head ${REVIEWED.slice(0, 12)} merged into trunk ${trunk.slice(0, 12)} — pass: y` }];
const protectedMain = () => ({ rule_name: "main", enable_push: false, enable_status_check: true,
  status_check_contexts: ["mesh/merge-gate", "mesh/repo-check"], block_admin_merge_override: true });

beforeEach(() => {
  state.sent = [];
  state.asked = [];
  state.statuses = judgedAt(TRUNK);
  state.trunk = TRUNK;
  state.emitted = [];
  state.rules = [protectedMain()];
  state.head = REVIEWED;
  state.landed = "";
  state.merged = false;
  state.mergeCommit = "feedface00000000000000000000000000000000";
  state.parents = null;
  state.commitsFail = 0;
});

const json = (res: ServerResponse, status: number, body: unknown): void => {
  res.writeHead(status, { "Content-Type": "application/json" });
  res.end(body === null ? "" : JSON.stringify(body));
};
const read = (req: IncomingMessage): Promise<any> =>
  new Promise((resolve) => {
    let text = "";
    req.on("data", (c) => (text += c));
    req.on("end", () => resolve(text ? JSON.parse(text) : null));
  });

const server = createServer(async (req, res) => {
  const url = new URL(req.url ?? "/", "http://fake");
  const path = url.pathname.replace(/^\/api\/v1/, "");
  const method = req.method ?? "GET";
  const body = await read(req);
  state.asked.push(`${method} ${path}${url.search}`);
  if (method !== "GET") state.sent.push({ method, path, body });
  const repo = "/repos/novox/mesh-catalog";
  if (method === "GET" && path === repo) return json(res, 200, { full_name: "novox/mesh-catalog", default_branch: "main" });
  if (method === "GET" && path === `${repo}/branch_protections`) return json(res, 200, state.rules);
  if (method === "GET" && path === `${repo}/branches/main`) return json(res, 200, { name: "main", commit: { id: state.trunk } });
  if (method === "GET" && path === `${repo}/pulls/7/files`) {
    return json(res, 200, url.searchParams.get("page") === "1" ? [{ filename: "modules/gitea/x.ts", status: "modified" }] : []);
  }
  if (method === "POST" && path === `${repo}/statuses/${state.head}`) {
    // Kept as the forge keeps them: the newest of a context first.
    state.statuses = [{ ...body, updated_at: new Date().toISOString() }, ...state.statuses.filter((s) => s.context !== body.context)];
    return json(res, 201, body);
  }
  if (method === "GET" && path === "/user") return json(res, 200, { login: "mesh-admin" });
  if (method === "GET" && path === "/repos/mesh-admin/scratch/branch_protections") return json(res, 200, []);
  if (method === "GET" && /^\/repos\/[^/]+\/[^/]+\/commits$/.test(path)) {
    return json(res, 200, [{ commit: { committer: { date: state.lastCommit } } }]);
  }
  if (method === "GET" && path === `${repo}/pulls/7`) {
    return json(res, 200, { number: 7, title: "x", state: state.merged ? "closed" : "open", merged: state.merged,
      head: { ref: "feat/x", sha: state.head }, base: { ref: "main" }, html_url: "http://fake/7",
      merge_commit_sha: state.merged ? state.mergeCommit : null });
  }
  if (method === "GET" && path === `${repo}/git/commits/${state.mergeCommit}`) {
    if (state.commitsFail) return json(res, state.commitsFail, { message: "the forge is not well" });
    const parents = state.parents ?? ["8a53532d89b20f0fe4fd0fbc814f2e86b61cbc6b", state.landed || state.head];
    return json(res, 200, { sha: state.mergeCommit, parents: parents.map((sha) => ({ sha })) });
  }
  if (method === "GET" && path === `${repo}/commits/${state.head}/status`) {
    return json(res, 200, { sha: state.head, state: "success", statuses: state.statuses });
  }
  if (method === "POST" && path === `${repo}/pulls/7/merge`) {
    state.merged = true;
    return json(res, 200, null);
  }
  return json(res, method === "GET" ? 200 : 201, {});
});
await new Promise<void>((r) => server.listen(0, "127.0.0.1", () => r()));
after(() => new Promise<void>((r) => server.close(() => r())));
const { port } = server.address() as { port: number };
const client = new GiteaClient(`http://127.0.0.1:${port}`, new ConfiguredToken("t"));
// gitea_commit_status is served from the watcher's bundle, beside the merge check's one writer (novox/hq issue 456).
const stateDir = mkdtempSync(join(tmpdir(), "gitea-tools-"));
// The merge check's one writer, as the watcher's bundle holds it: what the merge tool's pending goes through.
const writer = new GateWriter({ setCommitStatus: (o, r, sha, s) => client.setCommitStatus(o, r, sha, s),
  gateOf: async () => undefined, gateHistory: async () => [], headChecks: async () => ({}) });
const throughTheWriter: string[] = [];
const gates = { rechecked: (o: string, r: string, sha: string, s: any) => {
  throughTheWriter.push(`${sha.slice(0, 12)} ${s.context} ${s.state}`);
  return writer.rechecked(o, r, sha, s);
} };
const tools = [...getGiteaTools(client), commitStatusTool({
  setCommitStatus: (o, r, sha, s) => client.setCommitStatus(o, r, sha, s), gates: writer,
}), mergeTool(client, { gates, stateDir, emit: async (type, body) => { state.emitted.push({ type, body }); },
  now: () => new Date(2026, 9, 12, 15, 1) })];
const tool = (name: string) => tools.find((t) => t.name === name)!;
const writes = () => state.sent.map((s) => `${s.method} ${s.path}`);

test("gitea_api refuses the forge's administration, a branch's protection and the merge check's status, and sends nothing", async () => {
  for (const [method, path, body] of [
    ["PATCH", "/admin/users/agent", { admin: true }],
    ["DELETE", "/repos/novox/mesh-catalog/branch_protections/main", undefined],
    ["PATCH", "/repos/novox/mesh-catalog/branch_protections/main", { enable_status_check: false }],
    ["POST", "/repos/novox/mesh-catalog/statuses/abc1234", { context: "mesh/merge-gate", state: "success" }],
    ["POST", "/repos/novox/mesh-catalog/pulls/7/merge", { Do: "merge", force_merge: true }],
    ["PUT", "/repos/novox/mesh-catalog/collaborators/agent", { permission: "admin" }],
    ["POST", "/repos/novox/mesh-catalog/hooks", { type: "gitea" }],
    ["POST", "/repos/novox/mesh-catalog/keys", { key: "ssh-ed25519 AAAA" }],
    ["PATCH", "/repos/novox/mesh-catalog", { default_branch: "agent" }],
    ["DELETE", "/repos/novox/mesh-catalog", undefined],
    ["POST", "/repos/novox/mesh-catalog/transfer", { new_owner: "agent" }],
    ["POST", "/users/mesh-admin/tokens", { name: "mine", scopes: ["all"] }],
    ["PUT", "/orgs/novox/members/agent", undefined],
    ["PATCH", "/repos/novox/mesh-catalog/issues/1/../../branch_protections/main", { enable_push: true }],
    ["PATCH", "/repos/novox/mesh-catalog/issues/1/%2e%2e/%2e%2e/branch_protections/main", { enable_push: true }],
  ] as const) {
    await assert.rejects(tool("gitea_api").run({ path, method, ...(body ? { body } : {}) }),
      /not a write gitea_api makes|not taken|administration/, `${method} ${path}`);
  }
  await assert.rejects(tool("gitea_api").run({ path: "/admin/users" }), /administration/);
  assert.deepEqual(writes(), []);
});

test("gitea_api refuses a file written to the default branch or one a rule guards, and writes one on a branch of its own", async () => {
  const put = (body: Record<string, unknown>) =>
    tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/contents/modules/sudo/module.json", method: "PUT", body });
  await assert.rejects(put({ content: "e30=", sha: "x" }), /default branch/);
  await assert.rejects(put({ content: "e30=", sha: "x", branch: "main" }), /default branch/);
  state.rules.push({ rule_name: "release/*" });
  await assert.rejects(put({ content: "e30=", sha: "x", branch: "release/1" }), /protection rule release\/\*/);
  assert.deepEqual(writes(), []);
  await put({ content: "e30=", sha: "x", branch: "main", new_branch: "feat/sudo-docs" });
  assert.deepEqual(writes(), ["PUT /repos/novox/mesh-catalog/contents/modules/sudo/module.json"]);
});

test("a protection rule covers a branch as the forge decides it: classes, alternatives, a plain name in any case (issue 539)", async () => {
  // One table with the forge bundle (cmd/forge/rules.go): `forge` is the forge's answer; `guard` is where this
  // guard deliberately covers more — a rule Go's regexp reads otherwise than JavaScript's — and never less.
  const cases = JSON.parse(readFileSync(new URL("./rule-cases.json", import.meta.url), "utf8")) as
    Array<{ rule: string; branch: string; forge: boolean; guard?: boolean }>;
  assert.ok(cases.length >= 100);
  for (const c of cases) {
    assert.ok(c.guard === undefined || (c.guard && !c.forge), `${c.rule}: the guard may only cover more than the forge`);
    assert.equal(ruleCovers(c.rule, c.branch), c.guard ?? c.forge, `${c.rule} covers ${c.branch}`);
  }
  const put = (branch: string) => tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/contents/README.md",
    method: "PUT", body: { content: "e30=", sha: "x", branch } });
  state.rules.push({ rule_name: "release-[ab]" }, { rule_name: "{stable,lts}/*" });
  await assert.rejects(put("release-a"), /protection rule release-\[ab\]/);
  await assert.rejects(put("lts/2"), /protection rule \{stable,lts\}\/\*/);
  await assert.rejects(put("MAIN"), /protection rule main/);
  assert.deepEqual(writes(), []);
});

test("gitea_api still writes what an author writes", async () => {
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/issues/3/comments", method: "POST", body: { body: "hi" } });
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/pulls/7/reviews", method: "POST", body: { event: "COMMENT" } });
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/branch_protections" });
  assert.deepEqual(writes(), ["POST /repos/novox/mesh-catalog/issues/3/comments", "POST /repos/novox/mesh-catalog/pulls/7/reviews"]);
});

test("gitea_branch_protection_set only strengthens", async () => {
  const set = (args: Record<string, unknown>) =>
    tool("gitea_branch_protection_set").run({ owner: "novox", repo: "mesh-catalog", branch: "main", ...args });
  await assert.rejects(set({ status_checks: "" }), /drops the required status mesh\/merge-gate, mesh\/repo-check/);
  await assert.rejects(set({ status_checks: "mesh/merge-gate" }), /drops the required status mesh\/repo-check/);
  await assert.rejects(set({ status_checks: "mesh/merge-gate,mesh/repo-check", push: true }), /push to the branch directly/);
  await assert.rejects(set({ status_checks: "mesh/merge-gate,mesh/repo-check", block_admin_override: false }),
    /merge past a status/);
  assert.deepEqual(writes(), []);
  await set({ status_checks: "mesh/merge-gate,mesh/repo-check,mesh/delivery" });
  assert.deepEqual(writes(), ["PATCH /repos/novox/mesh-catalog/branch_protections/main"]);
});

test("gitea_merge_pull_request merges only a head whose required statuses all succeeded, and only that head", async () => {
  const merge = () => tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED });
  state.statuses = [judgedAt(TRUNK)[0], judgedAt(TRUNK, "failure")[1]];
  await assert.rejects(merge(), /not merged: .*mesh\/repo-check \(failure\)/);
  state.statuses = [judgedAt(TRUNK)[0]];
  await assert.rejects(merge(), /mesh\/repo-check \(missing\)/);
  await assert.rejects(tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED, method: "manually-merged" }), /not a merge method/);
  assert.deepEqual(writes(), []);
  // The operator said yes and the checks passed: the flow that stays.
  state.statuses = judgedAt(TRUNK);
  await merge();
  const sent = state.sent.find((s) => s.path.endsWith("/pulls/7/merge"))!;
  assert.equal(sent.body.force_merge, false);
  assert.equal(sent.body.head_commit_id, REVIEWED);
});


// **The merge tool refuses a verdict whose trunk commit is not the trunk's head, and asks the check itself** (novox/hq
// ADR 0323 §5, issue 341): node-engine #66 merged at 00:54 on a verdict of 00:49 that judged its head alone, after #65
// had moved the trunk. Both commits are named; one check is asked, the announcement a new head makes, and not a second
// while it is on its way; the refusal says how long the last check of the repository took; and once the verdict judges
// the trunk's head and passes, the merge goes through — asked again, never by itself.
test("gitea_merge_pull_request refuses a verdict judged against an earlier trunk, and asks the check once", async () => {
  const merge = () => tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7, head: REVIEWED });
  const { keepTook, tookFile } = await import("../dist/trunk.js");
  keepTook(tookFile(stateDir), "novox/mesh-catalog", { took: "4m31s", at: "2026-10-12T14:49:00Z" });

  state.trunk = MOVED; // another merge moved the trunk after the verdict
  await assert.rejects(merge(), (err: Error) => {
    assert.match(err.message, /is not merged: its verdict was judged against trunk 7a8b9c0d1e2f, and main is now 3c4d5e6f7a8b/);
    assert.match(err.message, /check of head abc1234def56 merged into trunk 3c4d5e6f7a8b was asked/);
    assert.match(err.message, /the last check of novox\/mesh-catalog took 4m31s/);
    assert.match(err.message, /never merges by itself/);
    return true;
  });
  assert.equal(state.merged, false);
  assert.equal(state.emitted.length, 1, "one check asked");
  assert.equal(state.emitted[0].type, "pull.updated");
  assert.equal(state.emitted[0].body.head_sha, REVIEWED);
  assert.equal(state.emitted[0].body.base, "main");
  assert.deepEqual(state.emitted[0].body.paths, ["modules/gitea/x.ts"]);
  // The announcement names the trunk's head, for a verdict no build judges (ADR 0323 §3).
  assert.equal(state.emitted[0].body.base_sha, MOVED);
  // Its pending went through the merge check's one writer (novox/hq issue 456), not around it.
  assert.deepEqual(throughTheWriter.splice(0), ["abc1234def56 mesh/merge-gate pending", "abc1234def56 mesh/repo-check pending"]);
  const gate = state.statuses.find((s) => s.context === "mesh/merge-gate")!;
  assert.equal(gate.state, "pending");
  assert.match(gate.description!, /^waiting in the build queue since 15:01: asked by the merge tool against trunk 3c4d5e6f7a8b/);
  assert.equal(state.statuses.find((s) => s.context === "mesh/repo-check")!.state, "pending");

  // Asked again while that check is on its way: refused, and nothing is asked a second time.
  await assert.rejects(merge(), /already asked and not yet answered .*not asked again; the last check of novox\/mesh-catalog took 4m31s.*mesh-delivery\.recheck/);
  assert.equal(state.emitted.length, 1, "no second check while one is on its way");
  state.statuses = [{ ...gate, description: "building on ace since 15:02" }, ...state.statuses.slice(1)];
  await assert.rejects(merge(), /not asked again/);
  assert.equal(state.emitted.length, 1);

  // A verdict put out of date by the trunk's move is asked too, once.
  state.statuses = judgedAt(TRUNK).map((s) => ({ ...s, state: "pending",
    description: "out of date: judged against trunk 7a8b9c0d1e2f, the trunk is now 3c4d5e6f7a8b; judged again on a recheck or when it is merged" }));
  await assert.rejects(merge(), /was judged against trunk 7a8b9c0d1e2f, and main is now 3c4d5e6f7a8b\. The check .* was asked/);
  assert.equal(state.emitted.length, 2);

  // A verdict that names no trunk commit — a build seat from before the rule — is not taken as the trunk's head.
  state.statuses = [{ context: "mesh/merge-gate", state: "success", description: "pass: x" },
    { context: "mesh/repo-check", state: "success", description: "pass: y" }];
  await assert.rejects(merge(), /names no trunk commit it was judged against, and main is now 3c4d5e6f7a8b/);
  assert.equal(state.emitted.length, 3);
  assert.equal(state.merged, false);

  // An ask that cannot be announced puts the statuses back to out of date, so the next ask asks again.
  state.statuses = judgedAt(TRUNK);
  const failing = mergeTool(client, { gates, stateDir, emit: async () => { throw new Error("the bus is away"); } });
  await assert.rejects(failing.run({ owner: "novox", repo: "mesh-catalog", number: 7, head: REVIEWED }),
    /its check could not be asked: the bus is away\. Nothing was merged/);
  assert.match(state.statuses.find((s) => s.context === "mesh/merge-gate")!.description!, /^out of date: /);
  await assert.rejects(merge(), /was asked/);
  assert.equal(state.emitted.length, 4, "asked again after the announcement failed");

  // The check judged the merge into the trunk's head and passed: asked again at the reviewed head, it merges.
  state.statuses = judgedAt(MOVED);
  const done = (await merge()) as Record<string, unknown>;
  assert.equal(done.merged, true);
  assert.equal(state.emitted.length, 4, "a merge asks no check");
});

// A merge lands only the head that was reviewed (novox/hq issue 381): mesh-controller#197 was reviewed at one head,
// force-pushed, checked green at the new one, and merged there, because the tool merged whatever the head was.
test("gitea_merge_pull_request merges only the head it is named, and refuses one that is not the head", async () => {
  const merge = (head?: string) => tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    ...(head === undefined ? {} : { head }) });

  // No head named: there is no review to hold the merge to.
  await assert.rejects(merge(), /name the head you reviewed/);
  await assert.rejects(merge("  "), /name the head you reviewed/);
  await assert.rejects(merge("main"), /does not name one commit/);
  // Seven characters can be matched by a commit made to match them: twelve are asked for.
  await assert.rejects(merge(REVIEWED.slice(0, 7)), /does not name one commit — give its sha, or at least its first 12/);
  await assert.rejects(merge(REVIEWED.slice(0, 11)), /does not name one commit/);

  // The head moved after the review, and its checks passed where it is now: the case of mesh-controller#197.
  state.head = "3ced96fc6f8ad6cc7b93698912cb08a71635158a";
  await assert.rejects(merge(REVIEWED), /its head is 3ced96fc6f8a, not the abc1234def5678901234567890abcdef12345678 you named/);
  await assert.rejects(merge(REVIEWED.slice(0, 12)), /not the abc1234def56 you named\. If you reviewed an earlier head/);
  assert.deepEqual(writes(), [], "a refused merge sends nothing");

  // Named as reviewed, by its first 12 characters, in either case: the forge is handed the whole head, and the merge
  // commit's second parent says that head landed.
  state.head = REVIEWED;
  const done = (await merge(REVIEWED.slice(0, 12).toUpperCase())) as Record<string, unknown>;
  const sent = state.sent.find((s) => s.path.endsWith("/pulls/7/merge"))!;
  assert.equal(sent.body.head_commit_id, REVIEWED);
  assert.equal(done.head, REVIEWED);
  assert.equal(done.landed, REVIEWED);
  assert.equal(done.read_back, undefined);
});

// The forge is handed the head, and what landed is read from the merge commit, not from the forge's record of the
// pull request (which here still says the head it was handed). Another head landing is an error that says the merge
// happened, never a field beside merged: true.
test("gitea_merge_pull_request is loud when the forge merged a head other than the one it was handed", async () => {
  state.landed = "3ced96fc6f8ad6cc7b93698912cb08a71635158a";
  await assert.rejects(tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED }), /WAS merged \(feedface0000.*\), but the forge merged 3ced96fc6f8a, not the abc1234def56 it was handed/);
  assert.equal(state.merged, true, "the merge happened: the error is what says so");
});

// The merge has happened once the forge says so: a read-back that fails after it must not read as nothing merged.
test("gitea_merge_pull_request says the merge happened when reading back what landed fails", async () => {
  state.commitsFail = 500;
  const done = (await tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED })) as Record<string, unknown>;
  assert.equal(state.merged, true);
  assert.equal(done.merged, true);
  assert.equal(done.landed, undefined);
  assert.match(String(done.read_back), /the merge happened, but reading back what landed failed/);

  // A parent the forge names without its sha is a failed read-back, never an empty head said to have landed.
  state.merged = false;
  state.commitsFail = 0;
  state.parents = ["8a53532d89b20f0fe4fd0fbc814f2e86b61cbc6b", ""];
  const blank = (await tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED })) as Record<string, unknown>;
  assert.equal(blank.merged, true);
  assert.match(String(blank.read_back), /without its sha/);
});

test("gitea_merge_pull_request reads back a fast-forward, and says it cannot read back a squash or a rebase", async () => {
  state.mergeCommit = REVIEWED; // a fast-forward lands the head itself
  // Its parents name another commit second, so reading a fast-forward as a merge's second parent would fail here.
  state.parents = ["8a53532d89b20f0fe4fd0fbc814f2e86b61cbc6b"];
  const ff = (await tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED, method: "fast-forward-only" })) as Record<string, unknown>;
  assert.equal(ff.landed, REVIEWED);
  assert.equal(ff.read_back, undefined);

  // A fast-forward whose commit the forge names otherwise is said, not raised: that it names the head is assumed.
  state.merged = false;
  state.mergeCommit = "feedface00000000000000000000000000000000";
  const odd = (await tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
    head: REVIEWED, method: "fast-forward-only" })) as Record<string, unknown>;
  assert.equal(odd.merged, true);
  assert.equal(odd.landed, undefined);
  assert.match(String(odd.read_back), /as this fast-forward's commit, not the head/);

  for (const method of ["squash", "rebase", "rebase-merge"]) {
    state.merged = false;
    state.mergeCommit = "feedface00000000000000000000000000000000";
    const done = (await tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7,
      head: REVIEWED, method })) as Record<string, unknown>;
    assert.equal(done.landed, undefined, method);
    assert.match(String(done.read_back), new RegExp(`a ${method} makes new commits that name no head`));
  }
});

test("gitea_delete_repo deletes only the tools' own user's repository, unguarded, untouched for 30 days, named in full", async () => {
  const del = (owner: string, name: string, confirm: unknown) => tool("gitea_delete_repo").run({ owner, name, confirm });
  await assert.rejects(del("novox", "mesh-catalog", true), /confirm must be the repository's full name/);
  await assert.rejects(del("novox", "mesh-catalog", "novox/mesh-catalog"), /not a repository of the tools' own user/);
  state.lastCommit = new Date().toISOString();
  await assert.rejects(del("mesh-admin", "scratch", "mesh-admin/scratch"), /within 30 days/);
  assert.deepEqual(writes(), []);
  state.lastCommit = "2026-01-01T00:00:00Z";
  await del("mesh-admin", "scratch", "mesh-admin/scratch");
  assert.deepEqual(writes(), ["DELETE /repos/mesh-admin/scratch"]);
});

test("gitea_api sends the path it judged, and refuses moving a pull request's base", async () => {
  await tool("gitea_api").run({ path: "/api/v1/repos/novox/mesh-catalog/issues/3/comments/?page=1", method: "POST", body: { body: "hi" } });
  assert.deepEqual(writes(), ["POST /repos/novox/mesh-catalog/issues/3/comments"]);
  await assert.rejects(tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/pulls/7", method: "PATCH",
    body: { base: "unguarded" } }), /changing a pull request's base/);
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/pulls/7", method: "PATCH", body: { title: "x" } });
  assert.equal(writes().length, 2);
});

test("gitea_merge_pull_request merges only into a branch whose protection requires the checks", async () => {
  state.rules = [];
  await assert.rejects(tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7, head: REVIEWED }),
    /no protection rule requiring the checks guards/);
  state.rules = [{ rule_name: "main", enable_push: false, enable_status_check: false, status_check_contexts: [] }];
  await assert.rejects(tool("gitea_merge_pull_request").run({ owner: "novox", repo: "mesh-catalog", number: 7, head: REVIEWED }),
    /no protection rule requiring the checks guards/);
  assert.deepEqual(writes(), []);
});

test("a rule named for a branch is not made weaker than the glob rule that guards it now", async () => {
  state.rules.push({ rule_name: "release/*", enable_push: false, enable_status_check: true,
    status_check_contexts: ["mesh/merge-gate"], block_admin_merge_override: true });
  const set = (args: Record<string, unknown>) =>
    tool("gitea_branch_protection_set").run({ owner: "novox", repo: "mesh-catalog", branch: "release/1", ...args });
  await assert.rejects(set({ status_checks: "" }), /drops the required status mesh\/merge-gate/);
  await assert.rejects(set({ status_checks: "mesh/merge-gate" }), /merge past a status/);
  assert.deepEqual(writes(), []);
  await set({ status_checks: "mesh/merge-gate", block_admin_override: true });
  assert.deepEqual(writes(), ["POST /repos/novox/mesh-catalog/branch_protections"]);
});

test("a repository owner or name is never another path", async () => {
  await assert.rejects(tool("gitea_update_pull_request").run({ owner: "novox", repo: "mesh-catalog/branch_protections/main?",
    number: 1, title: "x" }), /not a repository name/);
  await assert.rejects(tool("gitea_get_issue").run({ owner: "..", repo: "admin", number: 1 }), /not a repository owner/);
  assert.deepEqual(writes(), []);
});

test("the judges, without a forge", () => {
  assert.equal(routedPath("/api/v1/repos/a/b/issues?x=1"), "/repos/a/b/issues");
  assert.throws(() => routedPath("/repos/a/b/../c"), /dot segment/);
  assert.ok("allowed" in judgeApiCall("GET", "/repos/a/b/branch_protections", undefined));
  assert.ok("refused" in judgeApiCall("POST", "/repos/a/b/branch_protections", {}));
  assert.ok("contents" in judgeApiCall("POST", "/repos/a/b/contents", { new_branch: "x" }));
  assert.ok(ruleCovers("release/**", "release/a/b") && ruleCovers("feat/*", "feat/a") && !ruleCovers("feat/*", "feat/a/b"));
  assert.equal(judgeProtectionChange(null, { statusChecks: [] }), null);
  assert.equal(judgeProtectionChange(protectedMain(), { statusChecks: ["mesh/repo-check", "mesh/merge-gate"] }), null);
});

test("gitea_api never acts as another user: sudo, in any case, and any query key it does not send are refused", async () => {
  for (const path of ["/user?sudo=jschoubben", "/user?SUDO=jschoubben", "/repos/novox/mesh-catalog/issues?state=open&Sudo=jschoubben",
    "/repos/novox/mesh-catalog/issues?token=abc", "/repos/novox/mesh-catalog/issues?access_token=abc"]) {
    await assert.rejects(tool("gitea_api").run({ path }), /query key/, path);
  }
  await assert.rejects(tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/issues/3/comments?sudo=jschoubben",
    method: "POST", body: { body: "as the operator" } }), /query key sudo/);
  assert.deepEqual(state.asked, []);
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/issues?state=open&limit=5" });
  assert.deepEqual(state.asked, ["GET /repos/novox/mesh-catalog/issues?state=open&limit=5"]);
});

test("gitea_api never approves a pull request nor requests changes: those are the operator's", async () => {
  for (const [path, event] of [["/repos/novox/mesh-catalog/pulls/7/reviews", "APPROVE"],
    ["/repos/novox/mesh-catalog/pulls/7/reviews", "approve"], ["/repos/novox/mesh-catalog/pulls/7/reviews", "REQUEST_CHANGES"],
    ["/repos/novox/mesh-catalog/pulls/7/reviews/5", "APPROVE"]]) {
    await assert.rejects(tool("gitea_api").run({ path, method: "POST", body: { event, body: "lgtm" } }),
      /operator's at the forge/, `${path} ${event}`);
  }
  assert.deepEqual(writes(), []);
  await tool("gitea_api").run({ path: "/repos/novox/mesh-catalog/pulls/7/reviews", method: "POST", body: { event: "COMMENT", body: "a note" } });
  assert.deepEqual(writes(), ["POST /repos/novox/mesh-catalog/pulls/7/reviews"]);
});

test("no tool's caller text becomes another path or another user: `..` and `?sudo=` are refused before the forge", async () => {
  const repo = { owner: "novox", repo: "mesh-catalog" };
  const cases: Array<[string, Record<string, unknown>]> = [
    ["gitea_delete_branch", { ...repo, branch: ".." }],
    ["gitea_delete_branch", { ...repo, branch: "feat/../.." }],
    ["gitea_delete_branch", { ...repo, branch: "x?sudo=jschoubben" }],
    ["gitea_delete_branch", { ...repo, branch: "%2e%2e" }],
    ["gitea_get_file", { ...repo, path: "../../../../version" }],
    ["gitea_get_file", { ...repo, path: "README.md?sudo=jschoubben" }],
    ["gitea_commit_status", { ...repo, sha: "abc1234?sudo=jschoubben", context: "mesh/delivery", state: "success" }],
    ["gitea_commit_status", { ...repo, sha: "../../../admin/users", context: "mesh/delivery", state: "success" }],
    ["gitea_commit_statuses", { ...repo, sha: ".." }],
    ["gitea_commit_statuses", { ...repo, sha: "main?sudo=jschoubben" }],
    ["gitea_branch_protection_set", { ...repo, branch: "..", status_checks: "mesh/merge-gate" }],
    ["gitea_branch_protection_set", { ...repo, branch: "main?sudo=jschoubben", status_checks: "mesh/merge-gate" }],
    ["gitea_contains", { ...repo, commit: "..", in: "abc1234" }],
  ];
  for (const [name, args] of cases) {
    state.asked = [];
    await assert.rejects(tool(name).run(args), (err: unknown) => err instanceof Error, `${name} ${JSON.stringify(args)}`);
    // Nothing that is not a read of the repository's own rules reached the forge.
    assert.deepEqual(state.asked.filter((a) => !a.startsWith("GET /repos/novox/mesh-catalog/branch_protections")), [],
      `${name} ${JSON.stringify(args)} reached the forge`);
  }
  // What is ordinary still goes: a branch with a slash, a file in a directory.
  state.asked = [];
  await tool("gitea_delete_branch").run({ ...repo, branch: "feat/x" });
  await tool("gitea_get_file").run({ ...repo, path: "modules/gitea/module.json" }).catch(() => undefined);
  assert.deepEqual(state.asked, ["DELETE /repos/novox/mesh-catalog/branches/feat/x",
    "GET /repos/novox/mesh-catalog/contents/modules/gitea/module.json"]);
});