Boids flocking · qwen3.5-35b-a3b

Output generated Cost / run $0.0033 Runtime 33.8s

Prompt for this run

Build a full-screen canvas flocking simulation with 150 boids drawn as oriented triangles. Use HTML, CSS, and JavaScript as needed. Write it to `index.html` in the current working directory using your file tools. Inline your own CSS and JavaScript. Do not use external assets, CDNs, or network requests. No third-party libraries are provided. Required behavior: - Combine separation, alignment, and cohesion so nearby boids avoid crowding, align their headings, and form moving groups. Triangles point in their direction of travel. - Use bounded speed and steering so motion changes smoothly instead of teleporting. Wrap boids across screen edges. - Boids within a visible or documented cursor-influence radius steer away from the pointer. They resume flocking after the pointer moves away. - Provide Pause/Resume and Reset. Pause freezes simulation state; Reset restores a fresh population of 150 boids. - Fit the canvas to the viewport and keep the population and controls usable after resizing. Verify: Sample the flock at several moments to check coordinated movement and triangles pointing along their travel direction. Try the cursor interaction with available pointer actions, then pause and resume to check that the flock freezes and continues.

⛨ sandboxed Open in new tab ↗

TAKE IT TO CODE

A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.

RUN

modelqwen3.5-35b-a3b

vendorQwen

harnesspi 0.87.1 · browser iteration

generated2026-10-16

METRICS

runtime33.8s

tokens in9.9k

tokens out3.6k

cached0

cost / run$0.0033

Transcript · 7 messages

system

user

assistant

thinking

The user wants me to build a full-screen canvas flocking simulation with 150 boids. Let me break down the requirements:

1. **150 boids** drawn as oriented triangles
2. **Flocking behaviors:**
   - Separation: avoid crowding
   - Alignment: align headings
   - Cohesion: form moving groups
3. **Bounded speed and steering** - smooth motion changes, not teleporting
4. **Wrap around screen edges**
5. **Cursor interaction** - boids steer away from cursor within a radius
6. **Resume/Reset** - Pause/Resume buttons, Reset restores 150 boids
7. **Fit canvas to viewport** and handle resize

Let me write the complete HTML file with inline CSS and JavaScript.

I'll create a complete, self-contained index.html file with:
- HTML structure for the canvas and controls
- CSS for full-screen styling
- JavaScript for the boid simulation with all the required behaviors

Let me write this out:

I'll create a complete flocking simulation with 150 boids. Let me write the `index.html` file with all the required functionality.

→ write /tmp/job-3dUfq0/index.html (13395 bytes)

toolResult

Successfully wrote to /tmp/job-3dUfq0/index.html

assistant

thinking

Now let me verify the application by running it in the browser and checking the various behaviors.

Now let me verify the application by running it in the browser:

→ browser {"action":"screenshot"}

toolResult

Frame 1, +0ms

[Browser image supplied to model]

{"console":["warning: An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can escape its sandboxing.","log: Flocking simulation started with 150 boids","log: Controls: Pause/Resume, Reset, Mouse interaction"],"dom":"Pause Reset\nBoids: 150","images":"attached"}

assistant

thinking

The boids are visible and pointing in various directions - good start. Let me check more frames to see coordinated movement and the cursor interaction.

Let me check subsequent frames to see the flocking behavior in action: