Add worktree reseed command

Co-Authored-By: Paperclip <noreply@paperclip.ing>

cli/src/__tests__/worktree.test.ts

@@ -9,6 +9,8 @@ import {
   readSourceAttachmentBody,
   rebindWorkspaceCwd,
   resolveSourceConfigPath,
+  resolveWorktreeReseedSource,
+  resolveWorktreeReseedTargetPaths,
   resolveGitWorktreeAddArgs,
   resolveWorktreeMakeTargetPath,
   worktreeInitCommand,
@@ -482,27 +484,69 @@ describe("worktree helpers", () => {
     }
   });
 
-  it("requires an explicit source for worktree reseed", async () => {
+  it("requires an explicit reseed source", () => {
-    const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), "paperclip-worktree-reseed-source-"));
+    expect(() => resolveWorktreeReseedSource({})).toThrow(
-    const repoRoot = path.join(tempRoot, "repo");
+      "Pass --from <worktree> or --from-config/--from-instance explicitly so the reseed source is unambiguous.",
-    const originalCwd = process.cwd();
+    );
-    const originalPaperclipConfig = process.env.PAPERCLIP_CONFIG;
+  });
+
+  it("rejects mixed reseed source selectors", () => {
+    expect(() => resolveWorktreeReseedSource({
+      from: "current",
+      fromInstance: "default",
+    })).toThrow(
+      "Use either --from <worktree> or --from-config/--from-data-dir/--from-instance, not both.",
+    );
+  });
+
+  it("derives worktree reseed target paths from the adjacent env file", () => {
+    const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), "paperclip-worktree-reseed-target-"));
+    const worktreeRoot = path.join(tempRoot, "repo");
+    const configPath = path.join(worktreeRoot, ".paperclip", "config.json");
+    const envPath = path.join(worktreeRoot, ".paperclip", ".env");
 
     try {
-      fs.mkdirSync(repoRoot, { recursive: true });
+      fs.mkdirSync(path.dirname(configPath), { recursive: true });
-      delete process.env.PAPERCLIP_CONFIG;
+      fs.writeFileSync(configPath, JSON.stringify(buildSourceConfig()), "utf8");
-      process.chdir(repoRoot);
+      fs.writeFileSync(
-
+        envPath,
-      await expect(worktreeReseedCommand({ seed: false, yes: true })).rejects.toThrow(
+        [
-        "Reseed requires an explicit source.",
+          "PAPERCLIP_HOME=/tmp/paperclip-worktrees",
+          "PAPERCLIP_INSTANCE_ID=pap-1132-chat",
+        ].join("\n"),
+        "utf8",
       );
+      expect(
+        resolveWorktreeReseedTargetPaths({
+          configPath,
+          rootPath: worktreeRoot,
+        }),
+      ).toMatchObject({
+        cwd: worktreeRoot,
+        homeDir: "/tmp/paperclip-worktrees",
+        instanceId: "pap-1132-chat",
+      });
+    } finally {
+      fs.rmSync(tempRoot, { recursive: true, force: true });
+    }
+  });
+
+  it("rejects reseed targets without worktree env metadata", () => {
+    const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), "paperclip-worktree-reseed-target-missing-"));
+    const worktreeRoot = path.join(tempRoot, "repo");
+    const configPath = path.join(worktreeRoot, ".paperclip", "config.json");
+
+    try {
+      fs.mkdirSync(path.dirname(configPath), { recursive: true });
+      fs.writeFileSync(configPath, JSON.stringify(buildSourceConfig()), "utf8");
+      fs.writeFileSync(path.join(worktreeRoot, ".paperclip", ".env"), "", "utf8");
+
+      expect(() =>
+        resolveWorktreeReseedTargetPaths({
+          configPath,
+          rootPath: worktreeRoot,
+        })).toThrow("does not look like a worktree-local Paperclip instance");
     } finally {
-      process.chdir(originalCwd);
-      if (originalPaperclipConfig === undefined) {
-        delete process.env.PAPERCLIP_CONFIG;
-      } else {
-        process.env.PAPERCLIP_CONFIG = originalPaperclipConfig;
-      }
       fs.rmSync(tempRoot, { recursive: true, force: true });
     }
   });

cli/src/commands/worktree.ts

@@ -133,6 +133,17 @@ type WorktreeMergeHistoryOptions = {
   yes?: boolean;
 };
 
+type WorktreeReseedOptions = {
+  from?: string;
+  to?: string;
+  fromConfig?: string;
+  fromDataDir?: string;
+  fromInstance?: string;
+  seedMode?: string;
+  yes?: boolean;
+  allowLiveTarget?: boolean;
+};
+
 type EmbeddedPostgresInstance = {
   initialise(): Promise<void>;
   start(): Promise<void>;
@@ -738,6 +749,65 @@ export function resolveSourceConfigPath(opts: WorktreeInitOptions): string {
   return path.resolve(sourceHome, "instances", sourceInstanceId, "config.json");
 }
 
+export function resolveWorktreeReseedSource(input: WorktreeReseedOptions): ResolvedWorktreeReseedSource {
+  const fromSelector = nonEmpty(input.from);
+  const fromConfig = nonEmpty(input.fromConfig);
+  const fromDataDir = nonEmpty(input.fromDataDir);
+  const fromInstance = nonEmpty(input.fromInstance);
+  const hasExplicitConfigSource = Boolean(fromConfig || fromDataDir || fromInstance);
+
+  if (fromSelector && hasExplicitConfigSource) {
+    throw new Error(
+      "Use either --from <worktree> or --from-config/--from-data-dir/--from-instance, not both.",
+    );
+  }
+
+  if (fromSelector) {
+    const endpoint = resolveWorktreeEndpointFromSelector(fromSelector, { allowCurrent: true });
+    return {
+      configPath: endpoint.configPath,
+      label: endpoint.label,
+    };
+  }
+
+  if (hasExplicitConfigSource) {
+    const configPath = resolveSourceConfigPath({
+      fromConfig: fromConfig ?? undefined,
+      fromDataDir: fromDataDir ?? undefined,
+      fromInstance: fromInstance ?? undefined,
+    });
+    return {
+      configPath,
+      label: configPath,
+    };
+  }
+
+  throw new Error(
+    "Pass --from <worktree> or --from-config/--from-instance explicitly so the reseed source is unambiguous.",
+  );
+}
+
+export function resolveWorktreeReseedTargetPaths(input: {
+  configPath: string;
+  rootPath: string;
+}): WorktreeLocalPaths {
+  const envEntries = readPaperclipEnvEntries(resolvePaperclipEnvFile(input.configPath));
+  const homeDir = nonEmpty(envEntries.PAPERCLIP_HOME);
+  const instanceId = nonEmpty(envEntries.PAPERCLIP_INSTANCE_ID);
+
+  if (!homeDir || !instanceId) {
+    throw new Error(
+      `Target config ${input.configPath} does not look like a worktree-local Paperclip instance. Expected PAPERCLIP_HOME and PAPERCLIP_INSTANCE_ID in the adjacent .env.`,
+    );
+  }
+
+  return resolveWorktreeLocalPaths({
+    cwd: input.rootPath,
+    homeDir,
+    instanceId,
+  });
+}
+
 function resolveSourceConnectionString(config: PaperclipConfig, envEntries: Record<string, string>, portOverride?: number): string {
   if (config.database.mode === "postgres") {
     const connectionString = nonEmpty(envEntries.DATABASE_URL) ?? nonEmpty(config.database.connectionString);
@@ -1326,6 +1396,11 @@ type ResolvedWorktreeEndpoint = {
   isCurrent: boolean;
 };
 
+type ResolvedWorktreeReseedSource = {
+  configPath: string;
+  label: string;
+};
+
 function parseGitWorktreeList(cwd: string): GitWorktreeListEntry[] {
   const raw = execFileSync("git", ["worktree", "list", "--porcelain"], {
     cwd,
@@ -1819,6 +1894,13 @@ function renderMergePlan(plan: Awaited<ReturnType<typeof collectMergePlan>>["pla
   return lines.join("\n");
 }
 
+function resolveRunningEmbeddedPostgresPid(config: PaperclipConfig): number | null {
+  if (config.database.mode !== "embedded-postgres") {
+    return null;
+  }
+  return readRunningPostmasterPid(path.resolve(config.database.embeddedPostgresDataDir, "postmaster.pid"));
+}
+
 async function collectMergePlan(input: {
   sourceDb: ClosableDb;
   targetDb: ClosableDb;
@@ -2760,6 +2842,89 @@ export async function worktreeMergeHistoryCommand(sourceArg: string | undefined,
   }
 }
 
+export async function worktreeReseedCommand(opts: WorktreeReseedOptions): Promise<void> {
+  printPaperclipCliBanner();
+  p.intro(pc.bgCyan(pc.black(" paperclipai worktree reseed ")));
+
+  const seedMode = opts.seedMode ?? "full";
+  if (!isWorktreeSeedMode(seedMode)) {
+    throw new Error(`Unsupported seed mode "${seedMode}". Expected one of: minimal, full.`);
+  }
+
+  const targetEndpoint = opts.to
+    ? resolveWorktreeEndpointFromSelector(opts.to, { allowCurrent: true })
+    : resolveCurrentEndpoint();
+  const source = resolveWorktreeReseedSource(opts);
+
+  if (path.resolve(source.configPath) === path.resolve(targetEndpoint.configPath)) {
+    throw new Error("Source and target Paperclip configs are the same. Choose different --from/--to values.");
+  }
+  if (!existsSync(source.configPath)) {
+    throw new Error(`Source config not found at ${source.configPath}.`);
+  }
+
+  const targetConfig = readConfig(targetEndpoint.configPath);
+  if (!targetConfig) {
+    throw new Error(`Target config not found at ${targetEndpoint.configPath}.`);
+  }
+  const sourceConfig = readConfig(source.configPath);
+  if (!sourceConfig) {
+    throw new Error(`Source config not found at ${source.configPath}.`);
+  }
+
+  const targetPaths = resolveWorktreeReseedTargetPaths({
+    configPath: targetEndpoint.configPath,
+    rootPath: targetEndpoint.rootPath,
+  });
+  const runningTargetPid = resolveRunningEmbeddedPostgresPid(targetConfig);
+  if (runningTargetPid && !opts.allowLiveTarget) {
+    throw new Error(
+      `Target worktree database appears to be running (pid ${runningTargetPid}). Stop Paperclip in ${targetEndpoint.rootPath} before reseeding, or re-run with --allow-live-target if you want to override this guard.`,
+    );
+  }
+
+  const confirmed = opts.yes
+    ? true
+    : await p.confirm({
+      message: `Overwrite the isolated Paperclip DB for ${targetEndpoint.label} from ${source.label} using ${seedMode} seed mode?`,
+      initialValue: false,
+    });
+  if (p.isCancel(confirmed) || !confirmed) {
+    p.log.warn("Reseed cancelled.");
+    return;
+  }
+
+  if (runningTargetPid && opts.allowLiveTarget) {
+    p.log.warning(`Proceeding even though the target embedded PostgreSQL appears to be running (pid ${runningTargetPid}).`);
+  }
+
+  const spinner = p.spinner();
+  spinner.start(`Reseeding ${targetEndpoint.label} from ${source.label} (${seedMode})...`);
+  try {
+    const seeded = await seedWorktreeDatabase({
+      sourceConfigPath: source.configPath,
+      sourceConfig,
+      targetConfig,
+      targetPaths,
+      instanceId: targetPaths.instanceId,
+      seedMode,
+    });
+    spinner.stop(`Reseeded ${targetEndpoint.label} (${seedMode}).`);
+    p.log.message(pc.dim(`Source: ${source.configPath}`));
+    p.log.message(pc.dim(`Target: ${targetEndpoint.configPath}`));
+    p.log.message(pc.dim(`Seed snapshot: ${seeded.backupSummary}`));
+    for (const rebound of seeded.reboundWorkspaces) {
+      p.log.message(
+        pc.dim(`Rebound workspace ${rebound.name}: ${rebound.fromCwd} -> ${rebound.toCwd}`),
+      );
+    }
+    p.outro(pc.green(`Reseed complete for ${targetEndpoint.label}.`));
+  } catch (error) {
+    spinner.stop(pc.red("Failed to reseed worktree database."));
+    throw error;
+  }
+}
+
 export function registerWorktreeCommands(program: Command): void {
   const worktree = program.command("worktree").description("Worktree-local Paperclip instance helpers");
 
@@ -2833,6 +2998,19 @@ export function registerWorktreeCommands(program: Command): void {
     .option("--yes", "Skip the interactive confirmation prompt when applying", false)
     .action(worktreeMergeHistoryCommand);
 
+  worktree
+    .command("reseed")
+    .description("Re-seed an existing worktree-local instance from another Paperclip instance or worktree")
+    .option("--from <worktree>", "Source worktree path, directory name, branch name, or current")
+    .option("--to <worktree>", "Target worktree path, directory name, branch name, or current (defaults to current)")
+    .option("--from-config <path>", "Source config.json to seed from")
+    .option("--from-data-dir <path>", "Source PAPERCLIP_HOME used when deriving the source config")
+    .option("--from-instance <id>", "Source instance id when deriving the source config")
+    .option("--seed-mode <mode>", "Seed profile: minimal or full (default: full)", "full")
+    .option("--yes", "Skip the destructive confirmation prompt", false)
+    .option("--allow-live-target", "Override the guard that requires the target worktree DB to be stopped first", false)
+    .action(worktreeReseedCommand);
+
   program
     .command("worktree:cleanup")
     .description("Safely remove a worktree, its branch, and its isolated instance data")

doc/DEVELOPING.md

@@ -232,14 +232,38 @@ pnpm paperclipai worktree init --force --seed-mode minimal \
 
 That rewrites the worktree-local `.paperclip/config.json` + `.paperclip/.env`, recreates the isolated instance under `~/.paperclip-worktrees/instances/<worktree-id>/`, and preserves the git worktree contents themselves.
 
-For existing worktrees, prefer the dedicated reseed command instead of rebuilding the `worktree init --force` flags manually:
+For an already-created worktree where you want to keep the existing repo-local config/env and only overwrite the isolated database, use `worktree reseed` instead. Stop the target worktree's Paperclip server first so the command can replace the DB safely.
+
+**`pnpm paperclipai worktree reseed [options]`** — Re-seed an existing worktree-local instance from another Paperclip instance or worktree while preserving the target worktree's current config, ports, and instance identity.
+
+| Option | Description |
+|---|---|
+| `--from <worktree>` | Source worktree path, directory name, branch name, or `current` |
+| `--to <worktree>` | Target worktree path, directory name, branch name, or `current` (defaults to `current`) |
+| `--from-config <path>` | Source config.json to seed from |
+| `--from-data-dir <path>` | Source `PAPERCLIP_HOME` used when deriving the source config |
+| `--from-instance <id>` | Source instance id when deriving the source config |
+| `--seed-mode <mode>` | Seed profile: `minimal` or `full` (default: `full`) |
+| `--yes` | Skip the destructive confirmation prompt |
+| `--allow-live-target` | Override the guard that requires the target worktree DB to be stopped first |
+
+Examples:
 
 ```sh
-cd /path/to/existing/worktree
+# From the main repo, reseed a worktree from the current default/master instance.
-pnpm paperclipai worktree reseed --from-config /path/to/source/.paperclip/config.json --seed-mode full
+cd /path/to/paperclip
-```
+pnpm paperclipai worktree reseed \
+  --from current \
+  --to PAP-1132-assistant-ui-pap-1131-make-issues-comments-be-like-a-chat \
+  --seed-mode full \
+  --yes
 
-`worktree reseed` preserves the current worktree's instance id, ports, and branding while replacing only that worktree's isolated Paperclip instance data from the chosen source.
+# From inside a worktree, reseed it from the default instance config.
+cd /path/to/paperclip/.paperclip/worktrees/PAP-1132-assistant-ui-pap-1131-make-issues-comments-be-like-a-chat
+pnpm paperclipai worktree reseed \
+  --from-instance default \
+  --seed-mode full
+```
 
 **`pnpm paperclipai worktree:make <name> [options]`** — Create `~/NAME` as a git worktree, then initialize an isolated Paperclip instance inside it. This combines `git worktree add` with `worktree init` in a single step.
 
@@ -267,17 +291,6 @@ pnpm paperclipai worktree:make experiment --no-seed
 
 **`pnpm paperclipai worktree env [options]`** — Print shell exports for the current worktree-local Paperclip instance.
 
-**`pnpm paperclipai worktree reseed [options]`** — Replace the current worktree instance with a fresh seed from another Paperclip source while preserving the current worktree's ports and instance id.
-
-| Option | Description |
-|---|---|
-| `--from-config <path>` | Source config.json to seed from |
-| `--from-data-dir <path>` | Source `PAPERCLIP_HOME` used when deriving the source config |
-| `--from-instance <id>` | Source instance id when deriving the source config |
-| `--home <path>` | Home root for worktree instances (default: `~/.paperclip-worktrees`) |
-| `--seed-mode <mode>` | Seed profile: `minimal` or `full` (default: `minimal`) |
-| `--yes` | Skip the destructive confirmation prompt |
-
 | Option | Description |
 |---|---|
 | `-c, --config <path>` | Path to config file |