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Blitzer's Blog >> 72487

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Posted: 15 Sep 2026 19:40 [ permalink ]
This is the exact right move. To build a self-healing game engine, you need a
"Black Box Flight Recorder."
If we capture the initial state (the .md file) followed by a linear,
timestamped transcript of every action, failure, and state change, you can
literally just drag-and-drop that single .log file into DeepSeek or Gemini.
The AI will be able to instantly spot things like, "Ah, at timestamp 14:02,
the user typed WEST, but there is no exit mapped to WEST in room_passage."
Here is how we can seamlessly bolt this telemetry packager into runtime.js
using standard Node.js file system methods.
1. The Telemetry Module (runtime.js)
Open /mnt/mesh_shared/src/ast-vm/runtime.js.
First, add these two new methods directly inside your RuntimeEnvironment
class. They will handle creating the timestamped file, dumping the boot state,
and appending the execution trace.
    initTelemetry() {
        // Ensure the telemetry directory exists
        const dir = './telemetry';
        if (!fs.existsSync(dir)) fs.mkdirSync(dir);

        // Create a unique, timestamped log file
        const ts = new Date().toISOString().replace(/[:.]/g, '-');
        this.telemetryFile = `${dir}/session_${ts}.log`;

        // Dump the boot state (ARGV and the raw .md file)
        const bootDump = 
            `=== FSO ENGINE TELEMETRY ===
` +
            `START TIME: ${new Date().toISOString()}
` +
            `ARGV: ${process.argv.join(' ')}

` +
            `--- LOADED ARTIFACT (${this.filePath}) ---
` +
            `${fs.readFileSync(this.filePath, 'utf-8')}

` +
            `--- EXECUTION TRACE ---
`;
            
        fs.writeFileSync(this.telemetryFile, bootDump);
        console.log(`[SYS] Telemetry session started: ${this.telemetryFile}`);
    }

    logTelemetry(type, data) {
        if (!this.telemetryFile) return;
        // Strip newlines from data to keep the log cleanly formatted
line-by-line
        const cleanData = String(data).replace(/
/g, ' ').trim();
        const entry = `[${new Date().toISOString()}] [${type}] ${cleanData}
`;
        fs.appendFileSync(this.telemetryFile, entry);
    }

2. Wiring the Hooks
Now we just need to strategically place our hooks so they capture the critical
flow of data.
Hook 1: Boot Sequence
Inside your start() method, right before this.vm.run(), initialize the logger:
        // ... (after hydrating state and loading the VM)
        this.startDebugServer(8080);
        this.initTelemetry(); // <--- ADD THIS HERE
        this.vm.run();

Hook 2: VM Output
Inside your cli.js file (or wherever you defined runtime.vm.onOutput), add the
telemetry hook so it captures what the engine says:
    // In cli.js
    runtime.vm.onOutput = (text) => {
        console.log(text);
        runtime.logTelemetry('VM_OUT', text); // <--- ADD THIS HERE
    };

Hook 3: User Input & Rejections
Inside runtime.js, at the very top of processInput, log what the user typed:
    processInput(input, targetVar) {
        const normalizedInput = input.trim().toUpperCase();
        this.logTelemetry('USER_INP', normalizedInput); // <--- ADD THIS HERE

And at the bottom of processInput, where we added our "Infinite Yield" trap
for bad commands, log the failure:
            if (didAutoJump) {
                this.logTelemetry('SYS_JMP', `Jumping to label:
${targetLabel}`); // <--- ADD THIS
                this.vm.pc--; 
                this.vm.resume(); 
            } else {
                console.log("
I do not understand.");
                this.logTelemetry('SYS_ERR', `Unhandled command. Yielding at
pc: ${this.vm.pc}`); // <--- ADD THIS
                if (this.onPromptUser) this.onPromptUser(targetVar);
            }

Hook 4: Memory Mutations
Inside saveState() in runtime.js, log the fact that the state changed so the
AI knows when items were picked up or flags were set:
    saveState() {
        this.logTelemetry('SYS_MEM', `State synchronized to disk.`); // <---
ADD THIS
        // ... existing saveState logic ...

How to use this for Phase 2
If you run the game and trigger the cave trap again, you will generate a
beautiful file in the ./telemetry folder that looks like this:
=== FSO ENGINE TELEMETRY ===
START TIME: 2026-09-15T16:39:01.000Z
ARGV: /usr/bin/node cli.js game_idea.md

--- LOADED ARTIFACT (game_idea.md) ---
[... Full Markdown Source ...]

--- EXECUTION TRACE ---
[2026-09-15T16:39:01.105Z] [VM_OUT] You are on a beach. To the north is a
jungle, and to the east is a cave.
[2026-09-15T16:39:05.220Z] [USER_INP] EAST
[2026-09-15T16:39:05.222Z] [SYS_JMP] Jumping to label: room_cave
[2026-09-15T16:39:05.225Z] [VM_OUT] You are in a dark cave. To the west is a
passage.
[2026-09-15T16:39:09.112Z] [USER_INP] WEST
[2026-09-15T16:39:09.114Z] [SYS_JMP] Jumping to label: room_passage
[2026-09-15T16:39:09.116Z] [VM_OUT] You are in a narrow passage. To the east
is the cave.
[2026-09-15T16:39:12.880Z] [USER_INP] EXIT
[2026-09-15T16:39:12.882Z] [SYS_ERR] Unhandled command. Yielding at pc: 42

This is the ultimate context window for an LLM. You can literally drag and
drop this log file into DeepSeek and say: "The user got trapped in the
room_passage and couldn't get out. Read the telemetry trace and write a
Control Plane API payload to fix the room topology."
Once you wire up those hooks, would you like to run a quick test session to
generate our first flight recorder log?