this derivation will be built:
  /nix/store/yjliqcn9skfvq9g2iq86ccazzy64vcjl-treefmt-check.drv
building '/nix/store/yjliqcn9skfvq9g2iq86ccazzy64vcjl-treefmt-check.drv'
treefmt-check> tribuchet: building on eliza
treefmt-check> treefmt v2.6.0traversed 1126 files
treefmt-check> emitted 455 files for processing
treefmt-check> formatted 455 files (4 changed) in 1.865s
treefmt-check>  M home/.pi/agent/extensions/inbox.ts
treefmt-check>  M home/.pi/agent/extensions/python/index.ts
treefmt-check> diff --git a/home/.pi/agent/extensions/inbox.ts b/home/.pi/agent/extensions/inbox.ts
treefmt-check> index 0b5f038..f693974 100644
treefmt-check> --- a/home/.pi/agent/extensions/inbox.ts
treefmt-check> +++ b/home/.pi/agent/extensions/inbox.ts
treefmt-check> @@ -30,15 +30,25 @@ function parse(raw: string): Event {
treefmt-check>  }
treefmt-check>  
treefmt-check>  export default function (pi: ExtensionAPI) {
treefmt-check> -  const path = join(process.env.XDG_RUNTIME_DIR ?? "/tmp", "pi-inbox", `${process.pid}.sock`);
treefmt-check> +  const path = join(
treefmt-check> +    process.env.XDG_RUNTIME_DIR ?? "/tmp",
treefmt-check> +    "pi-inbox",
treefmt-check> +    `${process.pid}.sock`,
treefmt-check> +  );
treefmt-check>  
treefmt-check>    pi.registerMessageRenderer("inbox", (message, _options, theme) => {
treefmt-check>      const ev = message.details as Event;
treefmt-check>      let lines = ev.text.split("\n");
treefmt-check>      if (lines.length > TAIL_LINES) {
treefmt-check> -      lines = [`… ${lines.length - TAIL_LINES} lines`, ...lines.slice(-TAIL_LINES)];
treefmt-check> +      lines = [
treefmt-check> +        `… ${lines.length - TAIL_LINES} lines`,
treefmt-check> +        ...lines.slice(-TAIL_LINES),
treefmt-check> +      ];
treefmt-check>      }
treefmt-check> -    const title = theme.fg("accent", theme.bold(`▌inbox ${ev.source ?? ""}`.trimEnd()));
treefmt-check> +    const title = theme.fg(
treefmt-check> +      "accent",
treefmt-check> +      theme.bold(`▌inbox ${ev.source ?? ""}`.trimEnd()),
treefmt-check> +    );
treefmt-check>      return new Text(`${title}\n${theme.fg("muted", lines.join("\n"))}`, 0, 0);
treefmt-check>    });
treefmt-check>  
treefmt-check> @@ -46,20 +56,27 @@ export default function (pi: ExtensionAPI) {
treefmt-check>    mkdirSync(join(path, ".."), { recursive: true, mode: 0o700 });
treefmt-check>    rmSync(path, { force: true });
treefmt-check>    const server = createServer(async (conn) => {
treefmt-check> -      const raw = (await text(conn).catch(() => "")).slice(0, MAX_BYTES);
treefmt-check> -      const ev = parse(raw);
treefmt-check> -      if (!ev.text) return;
treefmt-check> -      const header = ev.source ? `[inbox: ${ev.source}]` : "[inbox]";
treefmt-check> -      pi.sendMessage(
treefmt-check> -        { customType: "inbox", content: `${header}\n${ev.text}`, display: true, details: ev },
treefmt-check> -        { deliverAs: "followUp", triggerTurn: true },
treefmt-check> -      );
treefmt-check> +    const raw = (await text(conn).catch(() => "")).slice(0, MAX_BYTES);
treefmt-check> +    const ev = parse(raw);
treefmt-check> +    if (!ev.text) return;
treefmt-check> +    const header = ev.source ? `[inbox: ${ev.source}]` : "[inbox]";
treefmt-check> +    pi.sendMessage(
treefmt-check> +      {
treefmt-check> +        customType: "inbox",
treefmt-check> +        content: `${header}\n${ev.text}`,
treefmt-check> +        display: true,
treefmt-check> +        details: ev,
treefmt-check> +      },
treefmt-check> +      { deliverAs: "followUp", triggerTurn: true },
treefmt-check> +    );
treefmt-check>    }).listen(path);
treefmt-check>    process.env.PI_INBOX = path;
treefmt-check>  
treefmt-check>    pi.on("session_start", async (_event, ctx) => {
treefmt-check>      const file = ctx.sessionManager.getSessionFile();
treefmt-check> -    process.env.PI_SESSION_ID = file ? basename(file, ".jsonl") : `pid-${process.pid}`;
treefmt-check> +    process.env.PI_SESSION_ID = file
treefmt-check> +      ? basename(file, ".jsonl")
treefmt-check> +      : `pid-${process.pid}`;
treefmt-check>    });
treefmt-check>  
treefmt-check>    pi.on("session_shutdown", async () => {
treefmt-check> diff --git a/home/.pi/agent/extensions/python/index.ts b/home/.pi/agent/extensions/python/index.ts
treefmt-check> index ca86ebf..a841c8a 100644
treefmt-check> --- a/home/.pi/agent/extensions/python/index.ts
treefmt-check> +++ b/home/.pi/agent/extensions/python/index.ts
treefmt-check> @@ -58,121 +58,127 @@ export default function (pi: ExtensionAPI) {
treefmt-check>      registerTool();
treefmt-check>    });
treefmt-check>  
treefmt-check> -  const registerTool = () => pi.registerTool({
treefmt-check> -    name: "python",
treefmt-check> -    label: "python",
treefmt-check> -    description:
treefmt-check> -      "Execute Python code in a persistent interpreter: variables, imports and open files survive between calls for the whole session. " +
treefmt-check> -      "The value of a trailing expression is echoed like in a REPL; use print() for anything else. " +
treefmt-check> -      "matplotlib figures are returned as images. Available: polars, matplotlib, requests, plumbum, pexpect, pyelftools + stdlib. " +
treefmt-check> -      `Output is truncated to the last ${DEFAULT_MAX_LINES} lines / ${
treefmt-check> -        formatSize(DEFAULT_MAX_BYTES)
treefmt-check> -      }.`,
treefmt-check> -    promptSnippet:
treefmt-check> -      "Run Python in a persistent interpreter (state kept across calls; polars, matplotlib, requests, pexpect, pyelftools)",
treefmt-check> -    promptGuidelines: [
treefmt-check> -      "Use python instead of bash for multi-step data work (JSON/CSV/logs/ELF), calculations, and anything where re-parsing input on every call would be wasteful; state persists, so load once and iterate.",
treefmt-check> -      "Drive interactive programs (ssh, REPLs, debuggers, installers) with pexpect inside the python tool: `child = pexpect.spawn(cmd, encoding='utf-8')` persists across calls; always pass `timeout=` to expect().",
treefmt-check> -      ...(process.env.PI_INBOX
treefmt-check> -        ? [
treefmt-check> -          "Don't block on long waits in python: run them in a `threading.Thread` that calls the predefined `notify(text, source=\"python\")` when done. It arrives later as an `[inbox: <source>]` message.",
treefmt-check> -        ]
treefmt-check> -        : []),
treefmt-check> -    ],
treefmt-check> -    parameters: Type.Object({
treefmt-check> -      code: Type.String({ description: "Python source to execute" }),
treefmt-check> -      timeout: Type.Optional(
treefmt-check> -        Type.Number({
treefmt-check> -          description: "Timeout in seconds (interrupts the cell, keeps state)",
treefmt-check> -        }),
treefmt-check> -      ),
treefmt-check> -    }),
treefmt-check> +  const registerTool = () =>
treefmt-check> +    pi.registerTool({
treefmt-check> +      name: "python",
treefmt-check> +      label: "python",
treefmt-check> +      description:
treefmt-check> +        "Execute Python code in a persistent interpreter: variables, imports and open files survive between calls for the whole session. " +
treefmt-check> +        "The value of a trailing expression is echoed like in a REPL; use print() for anything else. " +
treefmt-check> +        "matplotlib figures are returned as images. Available: polars, matplotlib, requests, plumbum, pexpect, pyelftools + stdlib. " +
treefmt-check> +        `Output is truncated to the last ${DEFAULT_MAX_LINES} lines / ${
treefmt-check> +          formatSize(DEFAULT_MAX_BYTES)
treefmt-check> +        }.`,
treefmt-check> +      promptSnippet:
treefmt-check> +        "Run Python in a persistent interpreter (state kept across calls; polars, matplotlib, requests, pexpect, pyelftools)",
treefmt-check> +      promptGuidelines: [
treefmt-check> +        "Use python instead of bash for multi-step data work (JSON/CSV/logs/ELF), calculations, and anything where re-parsing input on every call would be wasteful; state persists, so load once and iterate.",
treefmt-check> +        "Drive interactive programs (ssh, REPLs, debuggers, installers) with pexpect inside the python tool: `child = pexpect.spawn(cmd, encoding='utf-8')` persists across calls; always pass `timeout=` to expect().",
treefmt-check> +        ...(process.env.PI_INBOX
treefmt-check> +          ? [
treefmt-check> +            'Don\'t block on long waits in python: run them in a `threading.Thread` that calls the predefined `notify(text, source="python")` when done. It arrives later as an `[inbox: <source>]` message.',
treefmt-check> +          ]
treefmt-check> +          : []),
treefmt-check> +      ],
treefmt-check> +      parameters: Type.Object({
treefmt-check> +        code: Type.String({ description: "Python source to execute" }),
treefmt-check> +        timeout: Type.Optional(
treefmt-check> +          Type.Number({
treefmt-check> +            description:
treefmt-check> +              "Timeout in seconds (interrupts the cell, keeps state)",
treefmt-check> +          }),
treefmt-check> +        ),
treefmt-check> +      }),
treefmt-check>  
treefmt-check> -    // Without this pi's fallback renders only the tool name, hiding the code.
treefmt-check> -    renderCall(args, theme, context) {
treefmt-check> -      const text = (context.lastComponent as Text | undefined) ??
treefmt-check> -        new Text("", 0, 0);
treefmt-check> -      let out = theme.fg("toolTitle", theme.bold("python"));
treefmt-check> -      if (args.timeout) out += theme.fg("muted", ` (timeout ${args.timeout}s)`);
treefmt-check> -      const code = (args.code ?? "").trimEnd();
treefmt-check> -      if (code) out += "\n" + highlightCode(code, "python").join("\n");
treefmt-check> -      text.setText(out);
treefmt-check> -      return text;
treefmt-check> -    },
treefmt-check> +      // Without this pi's fallback renders only the tool name, hiding the code.
treefmt-check> +      renderCall(args, theme, context) {
treefmt-check> +        const text = (context.lastComponent as Text | undefined) ??
treefmt-check> +          new Text("", 0, 0);
treefmt-check> +        let out = theme.fg("toolTitle", theme.bold("python"));
treefmt-check> +        if (args.timeout) {
treefmt-check> +          out += theme.fg("muted", ` (timeout ${args.timeout}s)`);
treefmt-check> +        }
treefmt-check> +        const code = (args.code ?? "").trimEnd();
treefmt-check> +        if (code) out += "\n" + highlightCode(code, "python").join("\n");
treefmt-check> +        text.setText(out);
treefmt-check> +        return text;
treefmt-check> +      },
treefmt-check>  
treefmt-check> -    renderResult(result, options, theme, context) {
treefmt-check> -      const text = (context.lastComponent as Text | undefined) ??
treefmt-check> -        new Text("", 0, 0);
treefmt-check> -      const output = result.content
treefmt-check> -        .filter((c) => c.type === "text")
treefmt-check> -        .map((c) => (c as { text: string }).text)
treefmt-check> -        .join("\n")
treefmt-check> -        .trimEnd();
treefmt-check> -      const images = result.content.filter((c) => c.type === "image").length;
treefmt-check> -      const lines = output ? output.split("\n") : [];
treefmt-check> -      // Tail, not head: tracebacks and REPL results come last.
treefmt-check> -      const shown = options.expanded ? lines : lines.slice(-10);
treefmt-check> -      const color = context.isError ? "error" : "toolOutput";
treefmt-check> -      let out = theme.fg("muted", "─── output ───");
treefmt-check> -      if (lines.length > shown.length) {
treefmt-check> -        out += theme.fg(
treefmt-check> -          "muted",
treefmt-check> -          `\n... (${lines.length - shown.length} earlier lines, `,
treefmt-check> -        ) + keyHint("app.tools.expand", "to expand") + theme.fg("muted", ")");
treefmt-check> -      }
treefmt-check> -      if (shown.length) {
treefmt-check> -        out += "\n" + shown.map((l) => theme.fg(color, l)).join("\n");
treefmt-check> -      }
treefmt-check> -      if (images) out += theme.fg("muted", `\n[${images} image(s)]`);
treefmt-check> -      text.setText(out);
treefmt-check> -      return text;
treefmt-check> -    },
treefmt-check> +      renderResult(result, options, theme, context) {
treefmt-check> +        const text = (context.lastComponent as Text | undefined) ??
treefmt-check> +          new Text("", 0, 0);
treefmt-check> +        const output = result.content
treefmt-check> +          .filter((c) => c.type === "text")
treefmt-check> +          .map((c) => (c as { text: string }).text)
treefmt-check> +          .join("\n")
treefmt-check> +          .trimEnd();
treefmt-check> +        const images = result.content.filter((c) => c.type === "image").length;
treefmt-check> +        const lines = output ? output.split("\n") : [];
treefmt-check> +        // Tail, not head: tracebacks and REPL results come last.
treefmt-check> +        const shown = options.expanded ? lines : lines.slice(-10);
treefmt-check> +        const color = context.isError ? "error" : "toolOutput";
treefmt-check> +        let out = theme.fg("muted", "─── output ───");
treefmt-check> +        if (lines.length > shown.length) {
treefmt-check> +          out += theme.fg(
treefmt-check> +            "muted",
treefmt-check> +            `\n... (${lines.length - shown.length} earlier lines, `,
treefmt-check> +          ) + keyHint("app.tools.expand", "to expand") + theme.fg("muted", ")");
treefmt-check> +        }
treefmt-check> +        if (shown.length) {
treefmt-check> +          out += "\n" + shown.map((l) => theme.fg(color, l)).join("\n");
treefmt-check> +        }
treefmt-check> +        if (images) out += theme.fg("muted", `\n[${images} image(s)]`);
treefmt-check> +        text.setText(out);
treefmt-check> +        return text;
treefmt-check> +      },
treefmt-check>  
treefmt-check> -    async execute(_id, params, signal, _onUpdate, ctx) {
treefmt-check> -      kernel ??= new Kernel(python, ctx.cwd);
treefmt-check> -      const ac = new AbortController();
treefmt-check> -      signal?.addEventListener("abort", () => ac.abort(), { once: true });
treefmt-check> -      let timedOut = false;
treefmt-check> -      const timer = params.timeout
treefmt-check> -        ? setTimeout(() => {
treefmt-check> -          timedOut = true;
treefmt-check> -          ac.abort();
treefmt-check> -        }, params.timeout * 1000)
treefmt-check> -        : undefined;
treefmt-check> -      const r = await kernel.exec(params.code, ac.signal).finally(() =>
treefmt-check> -        clearTimeout(timer)
treefmt-check> -      );
treefmt-check> -      // Throw like bash so pi ends the run as "aborted" and sends queued prompts.
treefmt-check> -      if (signal?.aborted) throw new Error("Command aborted");
treefmt-check> -      if (timedOut && r.error?.startsWith("KeyboardInterrupt")) {
treefmt-check> -        r.error =
treefmt-check> -          `Timed out after ${params.timeout}s (cell interrupted, interpreter state kept)`;
treefmt-check> -      }
treefmt-check> +      async execute(_id, params, signal, _onUpdate, ctx) {
treefmt-check> +        kernel ??= new Kernel(python, ctx.cwd);
treefmt-check> +        const ac = new AbortController();
treefmt-check> +        signal?.addEventListener("abort", () => ac.abort(), { once: true });
treefmt-check> +        let timedOut = false;
treefmt-check> +        const timer = params.timeout
treefmt-check> +          ? setTimeout(() => {
treefmt-check> +            timedOut = true;
treefmt-check> +            ac.abort();
treefmt-check> +          }, params.timeout * 1000)
treefmt-check> +          : undefined;
treefmt-check> +        const r = await kernel.exec(params.code, ac.signal).finally(() =>
treefmt-check> +          clearTimeout(timer)
treefmt-check> +        );
treefmt-check> +        // Throw like bash so pi ends the run as "aborted" and sends queued prompts.
treefmt-check> +        if (signal?.aborted) throw new Error("Command aborted");
treefmt-check> +        if (timedOut && r.error?.startsWith("KeyboardInterrupt")) {
treefmt-check> +          r.error =
treefmt-check> +            `Timed out after ${params.timeout}s (cell interrupted, interpreter state kept)`;
treefmt-check> +        }
treefmt-check>  
treefmt-check> -      let text = r.stdout;
treefmt-check> -      if (r.stderr) {
treefmt-check> -        text += (text && !text.endsWith("\n") ? "\n" : "") + r.stderr;
treefmt-check> -      }
treefmt-check> -      if (r.result !== null) {
treefmt-check> -        text += (text && !text.endsWith("\n") ? "\n" : "") + r.result;
treefmt-check> -      }
treefmt-check> -      if (r.error) text += (text && !text.endsWith("\n") ? "\n" : "") + r.error;
treefmt-check> -      const t = truncateTail(text || (r.images.length ? "" : "(no output)"));
treefmt-check> -      if (t.truncated) {
treefmt-check> -        t.content =
treefmt-check> -          `[output truncated: showing last ${t.outputLines} of ${t.totalLines} lines]\n${t.content}`;
treefmt-check> -      }
treefmt-check> +        let text = r.stdout;
treefmt-check> +        if (r.stderr) {
treefmt-check> +          text += (text && !text.endsWith("\n") ? "\n" : "") + r.stderr;
treefmt-check> +        }
treefmt-check> +        if (r.result !== null) {
treefmt-check> +          text += (text && !text.endsWith("\n") ? "\n" : "") + r.result;
treefmt-check> +        }
treefmt-check> +        if (r.error) {
treefmt-check> +          text += (text && !text.endsWith("\n") ? "\n" : "") + r.error;
treefmt-check> +        }
treefmt-check> +        const t = truncateTail(text || (r.images.length ? "" : "(no output)"));
treefmt-check> +        if (t.truncated) {
treefmt-check> +          t.content =
treefmt-check> +            `[output truncated: showing last ${t.outputLines} of ${t.totalLines} lines]\n${t.content}`;
treefmt-check> +        }
treefmt-check>  
treefmt-check> -      const content: ({ type: "text"; text: string } | {
treefmt-check> -        type: "image";
treefmt-check> -        data: string;
treefmt-check> -        mimeType: string;
treefmt-check> -      })[] = [];
treefmt-check> -      if (t.content) content.push({ type: "text", text: t.content });
treefmt-check> -      for (const data of r.images) {
treefmt-check> -        content.push({ type: "image", data, mimeType: "image/png" });
treefmt-check> -      }
treefmt-check> -      return { content, details: undefined, isError: r.error !== null };
treefmt-check> -    },
treefmt-check> -  });
treefmt-check> +        const content: ({ type: "text"; text: string } | {
treefmt-check> +          type: "image";
treefmt-check> +          data: string;
treefmt-check> +          mimeType: string;
treefmt-check> +        })[] = [];
treefmt-check> +        if (t.content) content.push({ type: "text", text: t.content });
treefmt-check> +        for (const data of r.images) {
treefmt-check> +          content.push({ type: "image", data, mimeType: "image/png" });
treefmt-check> +        }
treefmt-check> +        return { content, details: undefined, isError: r.error !== null };
treefmt-check> +      },
treefmt-check> +    });
treefmt-check>  }
error: Cannot build '/nix/store/yjliqcn9skfvq9g2iq86ccazzy64vcjl-treefmt-check.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hffpfxrsah6g1grig5dhz4am0401ygv6-treefmt-check
       Last 25 log lines:
       > -      const content: ({ type: "text"; text: string } | {
       > -        type: "image";
       > -        data: string;
       > -        mimeType: string;
       > -      })[] = [];
       > -      if (t.content) content.push({ type: "text", text: t.content });
       > -      for (const data of r.images) {
       > -        content.push({ type: "image", data, mimeType: "image/png" });
       > -      }
       > -      return { content, details: undefined, isError: r.error !== null };
       > -    },
       > -  });
       > +        const content: ({ type: "text"; text: string } | {
       > +          type: "image";
       > +          data: string;
       > +          mimeType: string;
       > +        })[] = [];
       > +        if (t.content) content.push({ type: "text", text: t.content });
       > +        for (const data of r.images) {
       > +          content.push({ type: "image", data, mimeType: "image/png" });
       > +        }
       > +        return { content, details: undefined, isError: r.error !== null };
       > +      },
       > +    });
       >  }
       For full logs, run:
         nix log /nix/store/yjliqcn9skfvq9g2iq86ccazzy64vcjl-treefmt-check.drv