Muse Spark 1.2 for Copilot Chat
Adds Muse Spark 1.2 (plus 1.1 and the discounted Contributor tier) to the Copilot Chat model picker. Uses your Meta API key (BYOK).
Features
- Model
muse-spark-1.2 (1,048,576 context, 131,072 max output) — the current Meta default
- Model
muse-spark-1.2-contributor — same checkpoint, heavily discounted Contributor tier
- Model
muse-spark-1.1 — the earlier checkpoint, still supported
- Multimodal input: text, image, video, PDF
- Native vision via base64
image_url content parts (no proxy)
- Reasoning effort:
minimal, low, medium (default), high, xhigh
- Works with Copilot agent mode, tools, instructions, MCP, and skills via
LanguageModelChatProvider
Requirements
- VS Code 1.116+
- GitHub Copilot (Free, Pro, or Enterprise)
- Meta API key from dev.meta.ai (
LLM|...)
Install
- Install from the VS Code Marketplace or Open VSX
- Command Palette → Meta Spark: Set API Key
- Open Copilot Chat and select Muse Spark 1.2
Configuration
| Setting |
Default |
Description |
meta-spark-copilot.baseUrl |
https://api.meta.ai/v1 |
API base URL |
meta-spark-copilot.maxCompletionTokens |
0 |
Max output tokens (0 = API default) |
meta-spark-copilot.modelIdOverrides |
official IDs |
Override model IDs for proxies |
meta-spark-copilot.debugMode |
minimal |
minimal / metadata / verbose |
meta-spark-copilot.experimental.stabilizeToolList |
false |
Experimental tool-list stabilization |
Pricing and limits
Standard tier (muse-spark-1.1, muse-spark-1.2):
- Pricing: $1.25 / 1M input, $0.15 / 1M cached input, $4.25 / 1M output
- Rate limits: 3,000 RPM / 4M TPM per team
See Meta pricing
Contributor tier (muse-spark-1.2-contributor):
- Pricing: $0.10 / 1M input, $0.002 / 1M cached input, $0.20 / 1M output
- Rate limits: 60 RPM / 2.1M TPM per team
- Your prompts and completions may be used to train future Meta models
Common errors
| Code |
Meaning |
401 invalid_api_key |
Check key format (LLM\|...) |
429 rate_limit_exceeded |
Wait for Retry-After |
400 content_policy_violation |
Content blocked by policy |
503 / 504 |
Transient server/gateway issue; retry |
Development
npm install
npm run compile
Press F5 to launch the Extension Host.
To build a distributable .vsix package:
npm run package
The output lands in dist/.
Building and versioning
- Compile:
npm run compile (clean + tsc). Watch mode: npm run watch.
- Lint / format:
npm run lint (oxlint) and npm run format (oxfmt).
- Package:
npm run package produces dist/meta-spark-for-copilot-<version>.vsix using @vscode/vsce. It runs vscode:prepublish first, which prepares the marketplace README.
- Local install: from the Extension Host, run
Extensions: Install from VSIX... and pick the .vsix.
- Marketplace publish:
npm exec -- vsce publish --packagePath dist/<file>.vsix (requires VSCE_PAT), or npm exec -- ovsx publish <file>.vsix for Open VSX.
Versioning (SemVer):
- This is a major release (
2.0.0). Major bumps signal new model checkpoints or breaking changes to settings/model IDs.
- The repository uses release-please on
main. It derives the next version from conventional commits:
feat!: or fix!: (breaking) → major bumpfeat: → minor bumpfix: / perf: → patch bump
- To trigger the next release: merge conventional commits to
main. Release Please opens a release PR; merging it tags v<version> and the Release workflow builds and publishes the VSIX to the VS Code Marketplace, Open VSX, and GitHub Releases automatically.
- The extension version lives in
package.json (version) and is mirrored in .github/release-please-manifest.json. Keep them in sync when bumping manually.
- CHANGELOG entries are generated from commit messages; add release notes under the
## <version> heading produced by Release Please.
License
MIT
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