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The .murmur/murmur.yaml file is the shared configuration for your Murmur workspace. It lives in the .murmur/ directory at the root of your repository and is committed to version control. Every developer on the team uses the same file.

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File location

The configuration file is located at .murmur/murmur.yaml in your repository root. Murmur uses walk-up discovery — when you run a murmur command, it searches the current directory and all parent directories for a .murmur/ directory. This means you can run Murmur commands from any subdirectory in your repository. 
my-repo/
  .murmur/
    murmur.yaml          # shared config (committed to git)
    murmur.local.yaml    # per-developer overlay (gitignored)
    flights/             # flight definitions
  src/
  ...

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Creating the configuration

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Automatic setup

murmur setup
Auto-detects settings from your tenant and creates the configuration with sensible defaults. Useful for CI environments or when you want to get started quickly without interactive prompts.

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Field reference

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workspace

workspace: my-workspace
Type: string (required) The workspace name. Must match a workspace resource in your tenant’s catalog. The workspace name is used to resolve repos, images, placements, environments, and other infrastructure configuration.

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model

model: opus
Type: string (optional) The default model for agents spawned in this workspace. Valid values:
ValueModelBest for
opusClaude OpusComplex reasoning, architecture decisions, multi-file refactors
sonnetClaude SonnetBalanced capability and cost, most common tasks
haikuClaude HaikuSimple tasks, high volume, lowest cost
This sets the workspace default. Individual spawn calls can override the model per-agent using the model parameter or flag.

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fast_mode

fast_mode: true
Type: boolean (optional, default: false) When enabled, anthropic agents use fast mode.

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skip_checks

skip_checks:
  - lint
  - typecheck
  - visual-regression
Type: array of strings (optional) A list of CI check names to skip when evaluating whether an agent’s PR is ready. Agents wait for CI checks to pass before considering their work complete. Use skip_checks to exclude checks that are:
  • Flaky — intermittent failures unrelated to the agent’s changes
  • Irrelevant — checks that do not apply to the type of work agents do
  • Slow — optional checks that would unnecessarily delay the agent
Check names must match the exact name reported by GitHub’s check runs API.

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checks_timeout

checks_timeout: 20m
Type: Go duration string (optional, default: 15m) How long agents wait for CI checks to complete before timing out. Accepts Go duration format:
ExampleDuration
5m5 minutes
15m15 minutes (default)
1h1 hour
1h30m1 hour 30 minutes
If your CI pipeline consistently takes longer than 15 minutes, increase this value to avoid premature timeouts.

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api

api:
  address: api.murmur.example.com:443
Type: object (optional) API connection settings.

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api.address

Type: string (optional) The Murmur API server address. Defaults to the platform’s standard API endpoint. Only change this for:
  • Custom on-premise deployments
  • Development environments pointing at a different API
  • Multi-region setups with a region-specific endpoint

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Complete example

workspace: acme-backend
model: sonnet
fast_mode: false
skip_checks:
  - visual-regression
  - e2e-smoke
checks_timeout: 20m
api:
  address: api.murmur.example.com:443

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Environment variable overrides

Environment variables take precedence over all configuration file values. Use these for CI environments, temporary overrides, or per-shell customization.
VariableOverridesExample
MURMUR_CONTEXTConfig file selectiondev
MURMUR_CONFIGShared config file path/etc/murmur/config.yaml
MURMUR_LOCAL_CONFIGLocal overlay file path~/.config/murmur/local.yaml

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MURMUR_CONFIG

Override the shared config file path entirely: 
export MURMUR_CONFIG=/path/to/custom/murmur.yaml
Bypasses walk-up discovery and uses the specified file directly. Useful in CI where the working directory may not contain a .murmur/ directory.

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MURMUR_LOCAL_CONFIG

Override the local overlay file path: 
export MURMUR_LOCAL_CONFIG=/path/to/custom/murmur.local.yaml

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Per-developer overlay

Each developer has a personal overlay file at .murmur/murmur.local.yaml. This file is gitignored and contains developer-specific settings: 
developer: jdoe
encrypted_profile: <base64-encoded encrypted data>
ssh_public_keys:
  - ssh-ed25519 AAAA... jdoe@laptop
The local overlay is merged on top of the shared config. Values in the local overlay take precedence over the shared config but are overridden by environment variables. See Local Overlays for the full reference.

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Precedence order

When the same setting is specified in multiple places, the highest-precedence source wins: 
Environment variables       (highest priority)
    ↓
Local overlay               (.murmur/murmur.local.yaml)
    ↓
Shared config               (.murmur/murmur.yaml)
    ↓
Built-in defaults           (lowest priority)