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Grok Bot+18 agentsBosca Ceoil Composer: Game Music & SFX
Ask for "a tense boss theme" or "a coin pickup sound", and watch the notes appear in Bosca Ceoil Blue, the free chiptune step sequencer.
Free
Bosca Ceoil Composer: Game Music & SFX
Example session with this skill installed
Make a bright, bouncy 8-bar loop for my platformer's first level. Save the project and give me a seamless WAV.
- Read your context and instructions
- Compiled the bosca ceoil composer
Summary
Composed an original 8-bar platformer loop in Bosca Ceoil Blue, exported it, cut one seamless pass, and checked it for clipping and a clean seam.
| Setting | Value |
|---|---|
| Tempo | 128 BPM ("bouncy" range: 100–142) |
| Key | C major |
| Loop | 8 bars, exactly 15.000 s, no padding |
| Effect | Light reverb (30) |
Parts
| Channel | Voice | Role |
|---|---|---|
| 1 | Triangle Wave | Bass: root and octave bounce, C – Am – F – G |
| 2 | Pulse Wave (quiet) | 16th-note arpeggios following the chords |
| 3 | Square Wave | Lead: a 4-bar phrase, answered by a different ending in bars 7–8 |
| 4 | Simple Drumkit | Kick and snare backbeat, 8th hi-hats, snare fill into bars 5 and 1 |
Bar 8 ends on G with an F in the lead, which pulls straight back to C, so the loop's join sounds intentional.
Measurements (technical checks only, so please listen)
| Check | Result |
|---|---|
| Peak | -8.1 dB, 0 clipped samples |
| Loudness | -20.5 dB RMS (music target: -20 to -14) |
| Loop seam | sample jump 0.067 (fault threshold: 0.2) |
Files
exports/sunny_platformer_loop/sunny_platformer_loop.wav: seamless loop for your engineprojects/sunny_platformer_loop.ceol: editable project
Next steps
- Say the word and I'll start playback in the app. Is the lead too bright, or the tempo too fast for your character's run speed?
- Want an intro bar, a calmer underground variation, or a matching level-complete jingle?
- Ctrl+Z in the app undoes any edit.
Connects securely to your tools. The creator never sees your data.
About this skill
Bosca Ceoil Composer
Turn your AI coding agent into a game composer. Ask for "a tense boss theme" or "a coin pickup sound", and watch the notes appear in Bosca Ceoil Blue, the free chiptune step sequencer. You listen, you ask for changes, and you undo anything with Ctrl+Z.
This skill gives your agent the know-how to use the Bosca Ceoil MCP server well: what tempo and mode fit each game moment, how to arrange parts so a loop doesn't tire the player, and how to build each classic retro sound effect.
What you get
- Music by game moment. Tempo ranges for 19 moods, measured from more than 1,100 catalogue tracks, plus mode, palette and form for battles, menus, overworlds, horror, victory jingles and game-over stings.
- Sound effect recipes. Coin, jump, laser, hit, explosion, power-up, click, confirm and error, each with target measurements to aim for.
- Seamless loops. The agent arranges the loop twice, exports it, and cuts exactly one pass, so the join in your game is clean.
- Measured results. An included script reports peak, loudness, length, pitch and loop seam, which catches silent, clipped or badly cut files. Your agent can't hear, so it checks the numbers and leaves the listening to you.
- Game-ready files. Every piece is saved as a WAV to drop into your engine, plus a
.ceolproject you can keep editing. - Original material. The skill teaches technique from CC0 and openly licensed sources. It never copies melodies, even when you name a game you like.
Includes
SKILL.mdwith the brief, music and SFX workflows- 4 reference guides: music by context, SFX recipes, engine behaviour, finding more sources
- 3 Python scripts:
analyze_audio.py,extract_loop.py,finish_sfx.py - 11 demo files made with the skill: 9 SFX and 2 music loops
Requirements
You need the free, open-source bosca-ceoil-mcp server, Node.js 18+, the free Bosca Ceoil Blue app and Python 3 with numpy. Setup takes about 5 minutes and is covered in the server's README.
Bosca Ceoil Composer is an unofficial companion project and isn't affiliated with Bosca Ceoil Blue or its authors.
Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Game Development.
The agent can't hear audio, so measurements catch technical faults like silence, clipping or a bad loop seam, but only you can judge if it sounds good. WAV export renders in real time, so a 60-second song takes about 60 seconds. Tested on Windows 11 with Bosca Ceoil Blue 3.1.2. macOS and Linux should work but are untested, and a future app version could break the server. Output is chiptune and synth-style, limited to the app's 300+ built-in voices. There's no sampled audio or vocals.
How to use
- 1
Connect your agent to the Agensi MCP
Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup
- 2
Sign in to Agensi
Your agent shows a sign-in link. Sign in and click Allow.
- 3
Ask for what you need
Your agent loads this skill and uses it on your task. It always asks before buying a skill.
Reviews
This skill has been used 4 times.
Trust & safety
Security scan
Security scan passed 8 days ago
- Free with an Agensi account
- Accounts
Itch
- Software
- Bosca Ceoil MCPBosca Ceoil Blue
Node.js 18+
Python 3numpy
Permissions
Allowed Hosts
File Scopes
Terminal runs the bundled Python scripts that measure exports, cut loops and trim sound effects. Write Files covers saving WAV exports and .ceol projects to the folder you choose. The skill makes no network calls, and the MCP server only listens on 127.0.0.1.