feat: harden runtime readiness and session workflow

harness/.pi/extensions/gate/__tests__/gate_provided_session.test.js

@@ -1,5 +1,8 @@
 const test = require("node:test");
 const assert = require("node:assert");
+const fs = require("node:fs");
+const os = require("node:os");
+const path = require("node:path");
 const { createFakePi } = require("./fake_pi_runtime.js");
 const installGate = require("../../tht-gate.js").default ?? require("../../tht-gate.js");
 
@@ -14,6 +17,13 @@ test("con THT_SESSION il kickoff usa l'id fornito e NON crea la sessione", async
     const text = injected?.systemPrompt ?? "";
     assert.match(text, /2026-06-27-100000-test/);
     assert.doesNotMatch(text, /tht session new/);
+    assert.match(text, /retrieval pack non era ancora disponibile/i);
+    assert.match(text, /tht search pack/);
+    assert.doesNotMatch(text, /<retrieval-pack>/);
+    assert.match(text, /<tht-sessione-skill>/);
+    assert.match(text, /# Thoth session workflow \(phases 1-8\)/);
+    assert.match(text, /non esplorare il repository/i);
+    assert.doesNotMatch(text, /Carica la skill leggendo/);
   } finally {
     delete process.env.THT_SESSION;
   }
@@ -28,3 +38,39 @@ test("senza THT_SESSION il kickoff contiene tht session new (comportamento attua
   const text = injected?.systemPrompt ?? "";
   assert.match(text, /tht session new/);
 });
+
+test("con retrieval pack persistito lo inietta senza chiedere tool call ridondanti", async () => {
+  const tmp = fs.mkdtempSync(path.join(os.tmpdir(), "tht-gate-pack-"));
+  const bin = path.join(tmp, "bin");
+  fs.mkdirSync(bin);
+  const tht = path.join(bin, "tht");
+  fs.writeFileSync(
+    tht,
+    "#!/bin/sh\n" +
+      "printf \"# Retrieval pack\\n\\nTABELLA_CANDIDATA\\n\"\n",
+    { mode: 0o755 },
+  );
+  const oldPath = process.env.PATH;
+  process.env.PATH = bin + ":" + oldPath;
+  process.env.THT_SESSION = "2026-06-27-100000-pack";
+  try {
+    const { pi, ctx } = createFakePi();
+    ctx.cwd = tmp;
+    installGate(pi);
+    await pi.emit("input", { source: "rpc", text: `/nuova-domanda "x"` });
+    const injected = await pi.emit("before_agent_start", { systemPrompt: "BASE_STATIC" });
+    const text = injected?.systemPrompt ?? "";
+
+    assert.match(text, /<retrieval-pack>[\s\S]*TABELLA_CANDIDATA[\s\S]*<\/retrieval-pack>/);
+    assert.match(text, /NON eseguire `tht search pack`/);
+    assert.match(text, /SOLA ambiguità/);
+    assert.match(text, /chiama subito `reviewer_select`/);
+    assert.ok(text.indexOf("BASE_STATIC") < text.indexOf("<tht-sessione-skill>"));
+    assert.ok(text.indexOf("<tht-sessione-skill>") < text.indexOf("Istruzioni operative"));
+    assert.ok(text.indexOf("Istruzioni operative") < text.lastIndexOf("<retrieval-pack>"));
+  } finally {
+    process.env.PATH = oldPath;
+    delete process.env.THT_SESSION;
+    fs.rmSync(tmp, { recursive: true, force: true });
+  }
+});

harness/.pi/extensions/gate/__tests__/gate_resume_kickoff.test.js

@@ -18,4 +18,17 @@ test("the resume kickoff injects the bootstrap steps and forces in-turn action",
   // hardening: act now, in this same turn; do not stop after merely stating intent.
   assert.match(text, /in QUESTO stesso turno/i);
   assert.match(text, /NON terminare il turno/i);
+  assert.match(text, /<tht-sessione-skill>/);
+  assert.match(text, /# Thoth session workflow \(phases 1-8\)/);
+  assert.match(text, /non esplorare il repository/i);
+  assert.doesNotMatch(text, /Carica la skill leggendo/);
+});
+
+test("session_start after RPC input preserves the armed resume kickoff", async () => {
+  const { pi } = createFakePi();
+  installGate(pi);
+  await pi.emit("input", { source: "rpc", text: "/riprendi-sessione 2026-06-30-000000-x" });
+  await pi.emit("session_start", {});
+  const injected = await pi.emit("before_agent_start", { systemPrompt: "" });
+  assert.match(injected?.systemPrompt ?? "", /in QUESTO stesso turno/i);
 });