Add web4-governance plugin: R6 audit trails and session identity

Adds a governance extension that creates verifiable audit trails for
agent tool usage using the R6 framework (Rules+Role+Request+Reference+
Resource→Result). Uses the typed after_tool_call hooks wired in #1
to capture every tool invocation with provenance, timing, and
hash-linked chain integrity.

Includes:
- R6 request framework with tool classification
- Hash-linked JSONL audit chain with verification
- Software-bound session identity tokens (Soft LCT)
- Session state tracking with tool/category counts
- CLI commands: audit summary, audit verify, audit last
- 39 unit tests across all modules

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

extensions/web4-governance/clawdbot.plugin.json

@@ -0,0 +1,22 @@
+{
+  "id": "web4-governance",
+  "configSchema": {
+    "type": "object",
+    "additionalProperties": false,
+    "properties": {
+      "auditLevel": {
+        "type": "string",
+        "enum": ["minimal", "standard", "verbose"],
+        "default": "standard"
+      },
+      "showR6Status": {
+        "type": "boolean",
+        "default": true
+      },
+      "storagePath": {
+        "type": "string",
+        "description": "Override default ~/.web4/ storage path"
+      }
+    }
+  }
+}

extensions/web4-governance/index.ts

@@ -0,0 +1,236 @@
+/**
+ * Web4 Governance Plugin for Moltbot
+ *
+ * Adds R6 workflow formalism, audit trails, and session identity
+ * to moltbot agent sessions. Uses internal hooks for session lifecycle
+ * and typed after_tool_call hooks for tool-level audit.
+ */
+
+import type { MoltbotPluginApi } from "clawdbot/plugin-sdk";
+import { join } from "node:path";
+import { homedir } from "node:os";
+import { randomUUID } from "node:crypto";
+import { createSoftLCT } from "./src/soft-lct.js";
+import { createR6Request, hashOutput, classifyTool } from "./src/r6.js";
+import { AuditChain } from "./src/audit.js";
+import { SessionStore, type SessionState } from "./src/session-state.js";
+
+type PluginConfig = {
+  auditLevel?: string;
+  showR6Status?: boolean;
+  storagePath?: string;
+};
+
+const plugin = {
+  id: "web4-governance",
+  name: "Web4 Governance",
+  description: "R6 workflow formalism, audit trails, and trust-native session identity",
+  configSchema: {
+    type: "object" as const,
+    additionalProperties: false,
+    properties: {
+      auditLevel: { type: "string", enum: ["minimal", "standard", "verbose"], default: "standard" },
+      showR6Status: { type: "boolean", default: true },
+      storagePath: { type: "string" },
+    },
+  },
+
+  register(api: MoltbotPluginApi) {
+    const config = (api.pluginConfig ?? {}) as PluginConfig;
+    const storagePath = config.storagePath ?? join(homedir(), ".web4");
+    const auditLevel = config.auditLevel ?? "standard";
+    const logger = api.logger;
+
+    // Per-session state (keyed by sessionKey)
+    const sessions = new Map<string, { state: SessionState; audit: AuditChain }>();
+    const sessionStore = new SessionStore(storagePath);
+
+    function getOrCreateSession(sessionKey: string): { state: SessionState; audit: AuditChain } {
+      let entry = sessions.get(sessionKey);
+      if (!entry) {
+        const sessionId = sessionKey || randomUUID();
+        const lct = createSoftLCT(sessionId);
+        const state: SessionState = {
+          sessionId,
+          lct,
+          actionIndex: 0,
+          startedAt: new Date().toISOString(),
+          toolCounts: {},
+          categoryCounts: {},
+        };
+        const audit = new AuditChain(storagePath, sessionId);
+        sessionStore.save(state);
+        entry = { state, audit };
+        sessions.set(sessionKey, entry);
+        logger.info(`[web4] Session ${lct.tokenId} initialized (${auditLevel} audit)`);
+      }
+      return entry;
+    }
+
+    // --- Internal Hooks (these actually fire in current moltbot) ---
+
+    // Hook into agent bootstrap - fires when agent session starts
+    api.registerHook(["agent", "agent:bootstrap"], async (event) => {
+      const sessionKey = event.sessionKey || "default";
+      const entry = getOrCreateSession(sessionKey);
+      logger.info(`[web4] Governance active: ${entry.state.lct.tokenId} (session: ${sessionKey})`);
+    }, { name: "web4-agent-bootstrap", description: "Initialize Web4 governance session on agent bootstrap" });
+
+    // Hook into session events
+    api.registerHook(["session"], async (event) => {
+      const sessionKey = event.sessionKey || "default";
+      if (event.action === "new" || event.action === "start") {
+        const entry = getOrCreateSession(sessionKey);
+        logger.info(`[web4] Session ${event.action}: ${entry.state.lct.tokenId}`);
+      } else if (event.action === "end" || event.action === "stop" || event.action === "reset") {
+        const entry = sessions.get(sessionKey);
+        if (entry) {
+          const verification = entry.audit.verify();
+          logger.info(
+            `[web4] Session ${event.action}: ${entry.state.actionIndex} actions, ` +
+              `chain ${verification.valid ? "VALID" : "INVALID"} (${verification.recordCount} records)`,
+          );
+          sessionStore.save(entry.state);
+          sessions.delete(sessionKey);
+        }
+      }
+    }, { name: "web4-session-lifecycle", description: "Track Web4 session lifecycle events" });
+
+    // Hook into command events - captures all agent commands
+    api.registerHook(["command"], async (event) => {
+      const sessionKey = event.sessionKey || "default";
+      const entry = getOrCreateSession(sessionKey);
+      const { state } = entry;
+
+      // Create R6 request for the command
+      const toolName = String(event.context.command ?? event.action ?? "unknown");
+      const params = (event.context ?? {}) as Record<string, unknown>;
+
+      const r6 = createR6Request(
+        state.sessionId,
+        undefined,
+        toolName,
+        params,
+        state.actionIndex,
+        state.lastR6Id,
+        auditLevel,
+      );
+
+      // Record in audit chain with success (commands that reach hooks succeeded)
+      const result = {
+        status: "success" as const,
+        outputHash: hashOutput(event.context),
+      };
+      r6.result = result;
+      entry.audit.record(r6, result);
+
+      // Update session state
+      const category = classifyTool(toolName);
+      sessionStore.incrementAction(state, toolName, category, r6.id);
+
+      if (auditLevel === "verbose") {
+        logger.info(`[web4] R6 ${r6.id}: ${toolName} [${category}] → ${r6.request.target ?? "(no target)"}`);
+      }
+    }, { name: "web4-command-audit", description: "Record R6 audit entries for agent commands" });
+
+    // --- Typed Tool Hooks (wired via pi-tools.hooks.ts) ---
+
+    api.on("after_tool_call", (event, ctx) => {
+      const sid = ctx.sessionKey ?? ctx.agentId ?? "default";
+      const entry = sessions.get(sid);
+      if (!entry) return;
+
+      // Create R6 request directly (before_tool_call and after_tool_call
+      // receive separate event objects, so we can't pass data between them)
+      const r6 = createR6Request(
+        entry.state.sessionId,
+        ctx.agentId,
+        event.toolName,
+        event.params,
+        entry.state.actionIndex,
+        entry.state.lastR6Id,
+        auditLevel,
+      );
+      const result = {
+        status: (event.error ? "error" : "success") as "success" | "error",
+        outputHash: event.result ? hashOutput(event.result) : undefined,
+        errorMessage: event.error,
+        durationMs: event.durationMs,
+      };
+      r6.result = result;
+      entry.audit.record(r6, result);
+      sessionStore.incrementAction(entry.state, event.toolName, classifyTool(event.toolName), r6.id);
+
+      if (auditLevel === "verbose") {
+        logger.info(`[web4] R6 ${r6.id}: ${event.toolName} [${classifyTool(event.toolName)}] (${event.durationMs ?? 0}ms)`);
+      }
+    });
+
+    // --- CLI Commands ---
+
+    api.registerCli(
+      ({ program }) => {
+        const audit = program.command("audit").description("Web4 governance audit trail");
+
+        audit
+          .command("summary")
+          .description("Show session audit summary")
+          .action(() => {
+            for (const [sid, entry] of sessions) {
+              const v = entry.audit.verify();
+              console.log(`Session: ${entry.state.lct.tokenId}`);
+              console.log(`  Actions: ${entry.state.actionIndex}`);
+              console.log(`  Audit records: ${v.recordCount}`);
+              console.log(`  Chain valid: ${v.valid}`);
+              console.log(`  Tools: ${JSON.stringify(entry.state.toolCounts)}`);
+              console.log(`  Categories: ${JSON.stringify(entry.state.categoryCounts)}`);
+            }
+            if (sessions.size === 0) {
+              console.log("No active governance sessions.");
+            }
+          });
+
+        audit
+          .command("verify")
+          .description("Verify audit chain integrity")
+          .argument("[sessionId]", "Session ID to verify")
+          .action((sessionId?: string) => {
+            if (sessionId) {
+              const chain = new AuditChain(storagePath, sessionId);
+              const result = chain.verify();
+              console.log(`Chain valid: ${result.valid}`);
+              console.log(`Records: ${result.recordCount}`);
+              if (result.errors.length > 0) {
+                console.log("Errors:");
+                for (const e of result.errors) console.log(`  - ${e}`);
+              }
+            } else {
+              for (const [, entry] of sessions) {
+                const result = entry.audit.verify();
+                console.log(`${entry.state.sessionId}: ${result.valid ? "VALID" : "INVALID"} (${result.recordCount} records)`);
+              }
+            }
+          });
+
+        audit
+          .command("last")
+          .description("Show last N audit records")
+          .argument("[count]", "Number of records", "10")
+          .action((countStr: string) => {
+            const count = parseInt(countStr, 10) || 10;
+            for (const [, entry] of sessions) {
+              const records = entry.audit.getLast(count);
+              for (const r of records) {
+                console.log(`${r.timestamp} ${r.tool} → ${r.target ?? "?"} [${r.result.status}]`);
+              }
+            }
+          });
+      },
+      { commands: ["audit"] },
+    );
+
+    logger.info(`[web4] Web4 Governance plugin loaded (audit: ${auditLevel})`);
+  },
+};
+
+export default plugin;

extensions/web4-governance/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "@moltbot/web4-governance",
+  "version": "2026.1.27",
+  "type": "module",
+  "description": "Web4 governance with R6 workflow, audit trails, and trust tensors",
+  "moltbot": {
+    "extensions": ["./index.ts"]
+  },
+  "peerDependencies": {
+    "moltbot": ">=2026.1.26"
+  }
+}

extensions/web4-governance/src/audit.test.ts

@@ -0,0 +1,114 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { mkdirSync, rmSync, existsSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+import { AuditChain } from "./audit.js";
+import { createR6Request } from "./r6.js";
+
+const TEST_DIR = join(import.meta.dirname ?? ".", ".test-audit-tmp");
+
+function cleanup() {
+  if (existsSync(TEST_DIR)) {
+    rmSync(TEST_DIR, { recursive: true, force: true });
+  }
+}
+
+function makeR6(actionIndex: number, toolName = "Read") {
+  return createR6Request("test-session", "agent-1", toolName, { file_path: "/foo" }, actionIndex, undefined, "standard");
+}
+
+describe("AuditChain", () => {
+  afterEach(cleanup);
+
+  it("should create audit directory on construction", () => {
+    cleanup();
+    new AuditChain(TEST_DIR, "s1");
+    expect(existsSync(join(TEST_DIR, "audit"))).toBe(true);
+  });
+
+  it("should record an audit entry and write to JSONL", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "s1");
+    const r6 = makeR6(0);
+    const record = chain.record(r6, { status: "success", outputHash: "abc123" });
+
+    expect(record.recordId).toMatch(/^audit:/);
+    expect(record.r6RequestId).toBe(r6.id);
+    expect(record.tool).toBe("Read");
+    expect(record.result.status).toBe("success");
+    expect(record.provenance.prevRecordHash).toBe("genesis");
+    expect(chain.count).toBe(1);
+
+    const filePath = join(TEST_DIR, "audit", "s1.jsonl");
+    expect(existsSync(filePath)).toBe(true);
+    const content = readFileSync(filePath, "utf-8").trim();
+    const parsed = JSON.parse(content);
+    expect(parsed.recordId).toBe(record.recordId);
+  });
+
+  it("should chain records with hash links", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "s1");
+    chain.record(makeR6(0), { status: "success" });
+    const second = chain.record(makeR6(1), { status: "success" });
+
+    expect(second.provenance.prevRecordHash).not.toBe("genesis");
+    expect(second.provenance.prevRecordHash).toMatch(/^[a-f0-9]{16}$/);
+    expect(chain.count).toBe(2);
+  });
+
+  it("should verify a valid chain", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "s1");
+    chain.record(makeR6(0), { status: "success" });
+    chain.record(makeR6(1), { status: "success" });
+    chain.record(makeR6(2), { status: "error", errorMessage: "boom" });
+
+    const result = chain.verify();
+    expect(result.valid).toBe(true);
+    expect(result.recordCount).toBe(3);
+    expect(result.errors).toHaveLength(0);
+  });
+
+  it("should verify an empty/nonexistent chain as valid", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "nonexistent");
+    const result = chain.verify();
+    expect(result.valid).toBe(true);
+    expect(result.recordCount).toBe(0);
+  });
+
+  it("should resume chain state from existing file", () => {
+    cleanup();
+    const chain1 = new AuditChain(TEST_DIR, "s1");
+    chain1.record(makeR6(0), { status: "success" });
+    chain1.record(makeR6(1), { status: "success" });
+
+    // Recreate from same file
+    const chain2 = new AuditChain(TEST_DIR, "s1");
+    expect(chain2.count).toBe(2);
+    chain2.record(makeR6(2), { status: "success" });
+
+    const result = chain2.verify();
+    expect(result.valid).toBe(true);
+    expect(result.recordCount).toBe(3);
+  });
+
+  it("should retrieve last N records", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "s1");
+    for (let i = 0; i < 5; i++) {
+      chain.record(makeR6(i, i % 2 === 0 ? "Read" : "Write"), { status: "success" });
+    }
+
+    const last3 = chain.getLast(3);
+    expect(last3).toHaveLength(3);
+    expect(last3[0]!.provenance.actionIndex).toBe(2);
+    expect(last3[2]!.provenance.actionIndex).toBe(4);
+  });
+
+  it("should return empty array for getLast on nonexistent file", () => {
+    cleanup();
+    const chain = new AuditChain(TEST_DIR, "nope");
+    expect(chain.getLast(10)).toEqual([]);
+  });
+});

extensions/web4-governance/src/audit.ts

@@ -0,0 +1,137 @@
+/**
+ * Audit Trail - Hash-linked chain of action records.
+ *
+ * Each audit record links to its R6 request and the previous record,
+ * creating a verifiable chain of provenance.
+ */
+
+import { createHash } from "node:crypto";
+import { appendFileSync, mkdirSync, readFileSync, existsSync } from "node:fs";
+import { join } from "node:path";
+import type { R6Request } from "./r6.js";
+
+export type AuditRecord = {
+  recordId: string;
+  r6RequestId: string;
+  timestamp: string;
+  tool: string;
+  category: string;
+  target?: string;
+  result: {
+    status: "success" | "error" | "blocked";
+    outputHash?: string;
+    errorMessage?: string;
+    durationMs?: number;
+  };
+  provenance: {
+    sessionId: string;
+    actionIndex: number;
+    prevRecordHash: string;
+  };
+};
+
+export class AuditChain {
+  private storagePath: string;
+  private sessionId: string;
+  private prevHash: string = "genesis";
+  private recordCount: number = 0;
+
+  constructor(storagePath: string, sessionId: string) {
+    this.storagePath = storagePath;
+    this.sessionId = sessionId;
+    mkdirSync(join(this.storagePath, "audit"), { recursive: true });
+    this.loadExisting();
+  }
+
+  private get filePath(): string {
+    return join(this.storagePath, "audit", `${this.sessionId}.jsonl`);
+  }
+
+  private loadExisting(): void {
+    if (!existsSync(this.filePath)) return;
+    try {
+      const content = readFileSync(this.filePath, "utf-8").trim();
+      if (!content) return;
+      const lines = content.split("\n");
+      this.recordCount = lines.length;
+      const lastLine = lines[lines.length - 1];
+      if (lastLine) {
+        this.prevHash = createHash("sha256").update(lastLine).digest("hex").slice(0, 16);
+      }
+    } catch {
+      // Start fresh on error
+    }
+  }
+
+  record(r6: R6Request, result: AuditRecord["result"]): AuditRecord {
+    const record: AuditRecord = {
+      recordId: `audit:${r6.id.slice(3)}`,
+      r6RequestId: r6.id,
+      timestamp: new Date().toISOString(),
+      tool: r6.request.toolName,
+      category: r6.request.category,
+      target: r6.request.target,
+      result,
+      provenance: {
+        sessionId: this.sessionId,
+        actionIndex: r6.role.actionIndex,
+        prevRecordHash: this.prevHash,
+      },
+    };
+
+    const line = JSON.stringify(record);
+    appendFileSync(this.filePath, line + "\n");
+    this.prevHash = createHash("sha256").update(line).digest("hex").slice(0, 16);
+    this.recordCount++;
+
+    return record;
+  }
+
+  verify(): { valid: boolean; recordCount: number; errors: string[] } {
+    const errors: string[] = [];
+    if (!existsSync(this.filePath)) {
+      return { valid: true, recordCount: 0, errors: [] };
+    }
+
+    const content = readFileSync(this.filePath, "utf-8").trim();
+    if (!content) return { valid: true, recordCount: 0, errors: [] };
+
+    const lines = content.split("\n");
+    let prevHash = "genesis";
+
+    for (let i = 0; i < lines.length; i++) {
+      try {
+        const record: AuditRecord = JSON.parse(lines[i]!);
+        if (record.provenance.prevRecordHash !== prevHash) {
+          errors.push(`Record ${i}: hash mismatch (expected ${prevHash}, got ${record.provenance.prevRecordHash})`);
+        }
+        prevHash = createHash("sha256").update(lines[i]!).digest("hex").slice(0, 16);
+      } catch (e) {
+        errors.push(`Record ${i}: parse error`);
+      }
+    }
+
+    return { valid: errors.length === 0, recordCount: lines.length, errors };
+  }
+
+  get count(): number {
+    return this.recordCount;
+  }
+
+  getLast(n: number): AuditRecord[] {
+    if (!existsSync(this.filePath)) return [];
+    const content = readFileSync(this.filePath, "utf-8").trim();
+    if (!content) return [];
+    const lines = content.split("\n");
+    return lines
+      .slice(-n)
+      .map((line) => {
+        try {
+          return JSON.parse(line) as AuditRecord;
+        } catch {
+          return null;
+        }
+      })
+      .filter((r): r is AuditRecord => r !== null);
+  }
+}

extensions/web4-governance/src/r6.test.ts

@@ -0,0 +1,141 @@
+import { describe, expect, it } from "vitest";
+import {
+  classifyTool,
+  hashInput,
+  hashOutput,
+  extractTarget,
+  createR6Request,
+} from "./r6.js";
+
+describe("classifyTool", () => {
+  it("should classify file read tools", () => {
+    expect(classifyTool("Read")).toBe("file_read");
+    expect(classifyTool("Glob")).toBe("file_read");
+    expect(classifyTool("Grep")).toBe("file_read");
+  });
+
+  it("should classify file write tools", () => {
+    expect(classifyTool("Write")).toBe("file_write");
+    expect(classifyTool("Edit")).toBe("file_write");
+    expect(classifyTool("NotebookEdit")).toBe("file_write");
+  });
+
+  it("should classify command tools", () => {
+    expect(classifyTool("Bash")).toBe("command");
+  });
+
+  it("should classify network tools", () => {
+    expect(classifyTool("WebFetch")).toBe("network");
+    expect(classifyTool("WebSearch")).toBe("network");
+  });
+
+  it("should classify delegation tools", () => {
+    expect(classifyTool("Task")).toBe("delegation");
+  });
+
+  it("should classify state tools", () => {
+    expect(classifyTool("TodoWrite")).toBe("state");
+  });
+
+  it("should return unknown for unrecognized tools", () => {
+    expect(classifyTool("CustomTool")).toBe("unknown");
+    expect(classifyTool("")).toBe("unknown");
+  });
+});
+
+describe("hashInput", () => {
+  it("should return a 16-char hex string", () => {
+    const h = hashInput({ foo: "bar" });
+    expect(h).toMatch(/^[a-f0-9]{16}$/);
+  });
+
+  it("should produce deterministic hashes", () => {
+    expect(hashInput({ a: 1 })).toBe(hashInput({ a: 1 }));
+  });
+
+  it("should produce different hashes for different input", () => {
+    expect(hashInput({ a: 1 })).not.toBe(hashInput({ a: 2 }));
+  });
+});
+
+describe("hashOutput", () => {
+  it("should hash string output directly", () => {
+    const h = hashOutput("hello");
+    expect(h).toMatch(/^[a-f0-9]{16}$/);
+  });
+
+  it("should JSON-stringify non-string output", () => {
+    const h = hashOutput({ result: true });
+    expect(h).toMatch(/^[a-f0-9]{16}$/);
+  });
+
+  it("should produce deterministic hashes", () => {
+    expect(hashOutput("test")).toBe(hashOutput("test"));
+  });
+});
+
+describe("extractTarget", () => {
+  it("should extract file_path", () => {
+    expect(extractTarget("Read", { file_path: "/foo/bar.ts" })).toBe("/foo/bar.ts");
+  });
+
+  it("should extract path", () => {
+    expect(extractTarget("Glob", { path: "/src" })).toBe("/src");
+  });
+
+  it("should extract pattern", () => {
+    expect(extractTarget("Grep", { pattern: "TODO" })).toBe("TODO");
+  });
+
+  it("should extract and truncate long commands", () => {
+    const longCmd = "a".repeat(100);
+    const result = extractTarget("Bash", { command: longCmd });
+    expect(result).toHaveLength(83); // 80 + "..."
+    expect(result!.endsWith("...")).toBe(true);
+  });
+
+  it("should extract short commands without truncation", () => {
+    expect(extractTarget("Bash", { command: "ls -la" })).toBe("ls -la");
+  });
+
+  it("should extract url", () => {
+    expect(extractTarget("WebFetch", { url: "https://example.com" })).toBe("https://example.com");
+  });
+
+  it("should return undefined when no target found", () => {
+    expect(extractTarget("Task", { prompt: "do something" })).toBeUndefined();
+  });
+});
+
+describe("createR6Request", () => {
+  it("should create a well-formed R6 request", () => {
+    const r6 = createR6Request("sess-1", "agent-1", "Read", { file_path: "/foo" }, 0, undefined, "standard");
+
+    expect(r6.id).toMatch(/^r6:[a-f0-9]{8}$/);
+    expect(r6.timestamp).toBeTruthy();
+    expect(r6.rules).toEqual({ auditLevel: "standard", constraints: [] });
+    expect(r6.role).toEqual({
+      sessionId: "sess-1",
+      agentId: "agent-1",
+      actionIndex: 0,
+      bindingType: "soft-lct",
+    });
+    expect(r6.request.toolName).toBe("Read");
+    expect(r6.request.category).toBe("file_read");
+    expect(r6.request.target).toBe("/foo");
+    expect(r6.request.inputHash).toMatch(/^[a-f0-9]{16}$/);
+    expect(r6.reference).toEqual({
+      sessionId: "sess-1",
+      prevR6Id: undefined,
+      chainPosition: 0,
+    });
+    expect(r6.resource).toEqual({ approvalRequired: false });
+    expect(r6.result).toBeUndefined();
+  });
+
+  it("should link to previous R6 request", () => {
+    const r6 = createR6Request("s", undefined, "Bash", { command: "ls" }, 5, "r6:prev0001", "minimal");
+    expect(r6.reference.prevR6Id).toBe("r6:prev0001");
+    expect(r6.reference.chainPosition).toBe(5);
+  });
+});

extensions/web4-governance/src/r6.ts

@@ -0,0 +1,146 @@
+/**
+ * R6 Framework - Intent → Action → Result
+ *
+ * R6 = Rules + Role + Request + Reference + Resource → Result
+ *
+ * Every tool call gets a structured R6 record that captures intent,
+ * context, and outcome for audit and trust evaluation.
+ */
+
+import { createHash, randomUUID } from "node:crypto";
+
+export type R6Request = {
+  id: string;
+  timestamp: string;
+  rules: R6Rules;
+  role: R6Role;
+  request: R6RequestDetail;
+  reference: R6Reference;
+  resource: R6Resource;
+  result?: R6Result;
+};
+
+export type R6Rules = {
+  auditLevel: string;
+  constraints: string[];
+};
+
+export type R6Role = {
+  sessionId: string;
+  agentId?: string;
+  actionIndex: number;
+  bindingType: "soft-lct";
+};
+
+export type R6RequestDetail = {
+  toolName: string;
+  category: ToolCategory;
+  target?: string;
+  inputHash: string;
+};
+
+export type R6Reference = {
+  sessionId: string;
+  prevR6Id?: string;
+  chainPosition: number;
+};
+
+export type R6Resource = {
+  estimatedTokens?: number;
+  approvalRequired: boolean;
+};
+
+export type R6Result = {
+  status: "success" | "error" | "blocked";
+  outputHash?: string;
+  errorMessage?: string;
+  durationMs?: number;
+};
+
+export type ToolCategory =
+  | "file_read"
+  | "file_write"
+  | "command"
+  | "network"
+  | "delegation"
+  | "state"
+  | "mcp"
+  | "unknown";
+
+const TOOL_CATEGORIES: Record<string, ToolCategory> = {
+  Read: "file_read",
+  Glob: "file_read",
+  Grep: "file_read",
+  Write: "file_write",
+  Edit: "file_write",
+  NotebookEdit: "file_write",
+  Bash: "command",
+  WebFetch: "network",
+  WebSearch: "network",
+  Task: "delegation",
+  TodoWrite: "state",
+};
+
+export function classifyTool(toolName: string): ToolCategory {
+  return TOOL_CATEGORIES[toolName] ?? "unknown";
+}
+
+export function hashInput(input: Record<string, unknown>): string {
+  return createHash("sha256").update(JSON.stringify(input)).digest("hex").slice(0, 16);
+}
+
+export function hashOutput(output: unknown): string {
+  const str = typeof output === "string" ? output : JSON.stringify(output);
+  return createHash("sha256").update(str).digest("hex").slice(0, 16);
+}
+
+export function extractTarget(toolName: string, params: Record<string, unknown>): string | undefined {
+  if (params.file_path) return String(params.file_path);
+  if (params.path) return String(params.path);
+  if (params.pattern) return String(params.pattern);
+  if (params.command) {
+    const cmd = String(params.command);
+    return cmd.length > 80 ? cmd.slice(0, 80) + "..." : cmd;
+  }
+  if (params.url) return String(params.url);
+  return undefined;
+}
+
+export function createR6Request(
+  sessionId: string,
+  agentId: string | undefined,
+  toolName: string,
+  params: Record<string, unknown>,
+  actionIndex: number,
+  prevR6Id: string | undefined,
+  auditLevel: string,
+): R6Request {
+  return {
+    id: `r6:${randomUUID().slice(0, 8)}`,
+    timestamp: new Date().toISOString(),
+    rules: {
+      auditLevel,
+      constraints: [],
+    },
+    role: {
+      sessionId,
+      agentId,
+      actionIndex,
+      bindingType: "soft-lct",
+    },
+    request: {
+      toolName,
+      category: classifyTool(toolName),
+      target: extractTarget(toolName, params),
+      inputHash: hashInput(params),
+    },
+    reference: {
+      sessionId,
+      prevR6Id,
+      chainPosition: actionIndex,
+    },
+    resource: {
+      approvalRequired: false,
+    },
+  };
+}

extensions/web4-governance/src/session-state.test.ts

@@ -0,0 +1,89 @@
+import { afterEach, describe, expect, it } from "vitest";
+import { existsSync, readFileSync, rmSync } from "node:fs";
+import { join } from "node:path";
+import { SessionStore, type SessionState } from "./session-state.js";
+import { createSoftLCT } from "./soft-lct.js";
+
+const TEST_DIR = join(import.meta.dirname ?? ".", ".test-session-tmp");
+
+function cleanup() {
+  if (existsSync(TEST_DIR)) {
+    rmSync(TEST_DIR, { recursive: true, force: true });
+  }
+}
+
+function makeState(sessionId = "test-sess"): SessionState {
+  return {
+    sessionId,
+    lct: createSoftLCT(sessionId),
+    actionIndex: 0,
+    startedAt: new Date().toISOString(),
+    toolCounts: {},
+    categoryCounts: {},
+  };
+}
+
+describe("SessionStore", () => {
+  afterEach(cleanup);
+
+  it("should create sessions directory on construction", () => {
+    cleanup();
+    new SessionStore(TEST_DIR);
+    expect(existsSync(join(TEST_DIR, "sessions"))).toBe(true);
+  });
+
+  it("should save and load a session state", () => {
+    cleanup();
+    const store = new SessionStore(TEST_DIR);
+    const state = makeState("s1");
+    store.save(state);
+
+    const loaded = store.load("s1");
+    expect(loaded).not.toBeNull();
+    expect(loaded!.sessionId).toBe("s1");
+    expect(loaded!.lct.bindingType).toBe("software");
+  });
+
+  it("should return null for nonexistent session", () => {
+    cleanup();
+    const store = new SessionStore(TEST_DIR);
+    expect(store.load("nope")).toBeNull();
+  });
+
+  it("should persist as JSON file", () => {
+    cleanup();
+    const store = new SessionStore(TEST_DIR);
+    store.save(makeState("s1"));
+
+    const filePath = join(TEST_DIR, "sessions", "s1.json");
+    expect(existsSync(filePath)).toBe(true);
+    const raw = JSON.parse(readFileSync(filePath, "utf-8"));
+    expect(raw.sessionId).toBe("s1");
+  });
+
+  it("should increment action and persist", () => {
+    cleanup();
+    const store = new SessionStore(TEST_DIR);
+    const state = makeState("s1");
+    store.save(state);
+
+    store.incrementAction(state, "Read", "file_read", "r6:001");
+    expect(state.actionIndex).toBe(1);
+    expect(state.lastR6Id).toBe("r6:001");
+    expect(state.toolCounts["Read"]).toBe(1);
+    expect(state.categoryCounts["file_read"]).toBe(1);
+
+    store.incrementAction(state, "Read", "file_read", "r6:002");
+    expect(state.actionIndex).toBe(2);
+    expect(state.toolCounts["Read"]).toBe(2);
+
+    store.incrementAction(state, "Write", "file_write", "r6:003");
+    expect(state.toolCounts["Write"]).toBe(1);
+    expect(state.categoryCounts["file_write"]).toBe(1);
+
+    // Verify persisted
+    const loaded = store.load("s1");
+    expect(loaded!.actionIndex).toBe(3);
+    expect(loaded!.lastR6Id).toBe("r6:003");
+  });
+});

extensions/web4-governance/src/session-state.ts

@@ -0,0 +1,52 @@
+/**
+ * Session State - Tracks R6 chain state for a session.
+ */
+
+import { mkdirSync, writeFileSync, readFileSync, existsSync } from "node:fs";
+import { join } from "node:path";
+import type { SoftLCTToken } from "./soft-lct.js";
+
+export type SessionState = {
+  sessionId: string;
+  lct: SoftLCTToken;
+  actionIndex: number;
+  lastR6Id?: string;
+  startedAt: string;
+  toolCounts: Record<string, number>;
+  categoryCounts: Record<string, number>;
+};
+
+export class SessionStore {
+  private storagePath: string;
+
+  constructor(storagePath: string) {
+    this.storagePath = storagePath;
+    mkdirSync(join(this.storagePath, "sessions"), { recursive: true });
+  }
+
+  private filePath(sessionId: string): string {
+    return join(this.storagePath, "sessions", `${sessionId}.json`);
+  }
+
+  save(state: SessionState): void {
+    writeFileSync(this.filePath(state.sessionId), JSON.stringify(state, null, 2));
+  }
+
+  load(sessionId: string): SessionState | null {
+    const path = this.filePath(sessionId);
+    if (!existsSync(path)) return null;
+    try {
+      return JSON.parse(readFileSync(path, "utf-8")) as SessionState;
+    } catch {
+      return null;
+    }
+  }
+
+  incrementAction(state: SessionState, toolName: string, category: string, r6Id: string): void {
+    state.actionIndex++;
+    state.lastR6Id = r6Id;
+    state.toolCounts[toolName] = (state.toolCounts[toolName] ?? 0) + 1;
+    state.categoryCounts[category] = (state.categoryCounts[category] ?? 0) + 1;
+    this.save(state);
+  }
+}

extensions/web4-governance/src/soft-lct.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it, vi } from "vitest";
+import { createSoftLCT } from "./soft-lct.js";
+
+vi.mock("node:os", () => ({
+  hostname: () => "test-host",
+  userInfo: () => ({ username: "test-user" }),
+}));
+
+describe("createSoftLCT", () => {
+  it("should return a token with the correct structure", () => {
+    const token = createSoftLCT("session-123");
+    expect(token).toMatchObject({
+      sessionId: "session-123",
+      bindingType: "software",
+    });
+    expect(token.tokenId).toMatch(/^web4:session:[a-f0-9]{8}:session-/);
+    expect(token.machineHash).toMatch(/^[a-f0-9]{8}$/);
+    expect(token.createdAt).toBeTruthy();
+  });
+
+  it("should produce a deterministic machineHash for same host+user", () => {
+    const a = createSoftLCT("s1");
+    const b = createSoftLCT("s2");
+    expect(a.machineHash).toBe(b.machineHash);
+  });
+
+  it("should truncate sessionId to first 8 chars in tokenId", () => {
+    const token = createSoftLCT("abcdefghijklmnop");
+    expect(token.tokenId).toContain(":abcdefgh");
+    expect(token.tokenId).not.toContain("ijklmnop");
+  });
+
+  it("should set createdAt to a valid ISO timestamp", () => {
+    const token = createSoftLCT("s1");
+    expect(new Date(token.createdAt).toISOString()).toBe(token.createdAt);
+  });
+});

extensions/web4-governance/src/soft-lct.ts

@@ -0,0 +1,35 @@
+/**
+ * Soft LCT - Software-bound Linked Context Token.
+ *
+ * Generates a session identity token from machine + user context.
+ * NOT hardware-bound (no TPM/SE). Trust interpretation is up to
+ * the relying party.
+ */
+
+import { createHash } from "node:crypto";
+import { hostname, userInfo } from "node:os";
+
+export type SoftLCTToken = {
+  tokenId: string;
+  sessionId: string;
+  machineHash: string;
+  createdAt: string;
+  bindingType: "software";
+};
+
+export function createSoftLCT(sessionId: string): SoftLCTToken {
+  const machine = hostname();
+  const user = userInfo().username;
+  const machineHash = createHash("sha256")
+    .update(`${machine}:${user}`)
+    .digest("hex")
+    .slice(0, 8);
+
+  return {
+    tokenId: `web4:session:${machineHash}:${sessionId.slice(0, 8)}`,
+    sessionId,
+    machineHash,
+    createdAt: new Date().toISOString(),
+    bindingType: "software",
+  };
+}