Agent file format

Input Format (Markdown with Front Matter)

The compiler expects markdown files with YAML front matter similar to gh-aw:

---
name: "name for this agent"
description: "One line description for this agent"
target: standalone # Optional: "standalone" (default), "1es", "job", or "stage". See docs/targets.md.
engine: copilot # Engine identifier. Defaults to copilot. Currently only 'copilot' (GitHub Copilot CLI) is supported.
# engine:                        # Alternative object format (with additional options)
#   id: copilot
#   model: claude-opus-4.7
#   timeout-minutes: 30
workspace: repo # Optional: "root", "repo" (alias: "self"), or a checked-out repository alias. If not specified, defaults to "root" when no additional repositories are listed in `repos:`, and to "repo" when one or more additional repos are checked out. See "Workspace Defaults" below.
pool:                          # Microsoft-hosted agent (default for standalone target)
  vmImage: ubuntu-22.04        # defaults to ubuntu-22.04 when pool is omitted entirely
# pool: MySelfHostedPool       # String form -- legacy shorthand for a self-hosted pool name
# pool:                        # Self-hosted pool object form
#   name: MySelfHostedPool
# pool:                        # 1ES pool object form (set os: when needed)
#   name: AZS-1ES-L-MMS-ubuntu-22.04
#   os: linux                  # Operating system: "linux" or "windows". Defaults to "linux".
repos:                           # compact repository declarations (replaces repositories: + checkout:)
  - my-org/my-repo               # shorthand: alias="my-repo", type=git, ref=refs/heads/main, checkout=true
  - reponame=my-org/another-repo # shorthand with explicit alias
  - name: my-org/templates       # object form for full control
    ref: refs/heads/release/2.x
    checkout: false              # declared as resource only, not checked out by the agent
tools:                         # optional tool configuration
  bash: ["cat", "ls", "grep"]  # explicit bash allow-list; when omitted, all bash tools are allowed (unrestricted)
  edit: true                   # enable file editing tool (default: true)
  cache-memory: true           # persistent memory across runs (see docs/tools.md)
  # cache-memory:              # Alternative object format (with options)
  #   allowed-extensions: [.md, .json]
  azure-devops: true           # first-class ADO MCP integration (see docs/tools.md)
  # azure-devops:              # Alternative object format (with scoping)
  #   toolsets: [repos, wit]
  #   allowed: [wit_get_work_item]
  #   org: myorg
runtimes:                      # optional runtime configuration (language environments)
  lean: true                   # Lean 4 theorem prover (see docs/runtimes.md)
  # lean:                      # Alternative object format (with toolchain pinning)
  #   toolchain: "leanprover/lean4:v4.29.1"
  # python: true               # Python runtime -- auto-installs via UsePythonVersion@0 (see docs/runtimes.md)
  # python:                    # Alternative object format (pin version, configure internal feed)
  #   version: "3.12"
  #   feed-url: "https://pkgs.dev.azure.com/myorg/_packaging/myfeed/pypi/simple/"
  # node: true                 # Node.js runtime -- auto-installs via UseNode@1 (see docs/runtimes.md)
  # node:                      # Alternative object format (pin version, configure internal feed)
  #   version: "22.x"
  #   feed-url: "https://pkgs.dev.azure.com/ORG/PROJECT/_packaging/FEED/npm/registry/"
  # dotnet: true               # .NET runtime -- auto-installs via UseDotNet@2 (see docs/runtimes.md)
  # dotnet:                    # Alternative object format (pin version, configure internal feed via nuget.config)
  #   version: "8.0.x"          # use "global.json" to pin from the repo's global.json
  #   feed-url: "https://pkgs.dev.azure.com/myorg/_packaging/myfeed/nuget/v3/index.json"
# env:                          # RESERVED: workflow-level environment variables (field exists but not yet used by compiler)
#   CUSTOM_VAR: "value"        # For now, use engine.env or mcp-servers.<name>.env for process-specific vars
# inlined-imports: false        # When true, resolve {{#runtime-import ...}} markers at compile time
#                               # (default: false -- markers are resolved at pipeline runtime, so
#                               # prompt-body edits do not require recompilation).
#                               # See the Inlined Imports section below for details.
mcp-servers:
  my-custom-tool:              # containerized MCP server (requires container field)
    container: "node:20-slim"
    entrypoint: "node"
    entrypoint-args: ["path/to/mcp-server.js"]
    allowed:
      - custom_function_1
      - custom_function_2
safe-outputs:                  # optional per-tool configuration for safe outputs
  create-work-item:
    work-item-type: Task
    assignee: "user@example.com"
    tags:
      - automated
      - agent-created
    artifact-link:             # optional: link work item to repository branch
      enabled: true
      branch: main
on:                            # trigger configuration (unified under on: key)
  schedule: daily around 14:00 # fuzzy schedule - see docs/schedule-syntax.md
  pipeline:
    name: "Build Pipeline"     # source pipeline name
    project: "OtherProject"    # optional: project name if different
    branches:                  # optional: branches to trigger on
      - main
      - release/*
    filters:                   # optional runtime filters (compiled to gate step)
      source-pipeline: "Build*" # glob match on upstream pipeline name (Build.TriggeredBy.DefinitionName)
      branch: "refs/heads/main" # glob match on triggering branch (Build.SourceBranch)
      time-window:
        start: "09:00"
        end: "17:00"
      build-reason:
        include: [IndividualCI]  # only run when triggered by a commit push (not a schedule)
        exclude: [Schedule]
      expression: "eq(variables['Custom.Flag'], 'true')"  # raw ADO condition escape hatch
  pr:                          # PR trigger
    branches:
      include: [main]
    paths:
      include: [src/*]
    filters:                   # runtime PR filters (compiled to gate step)
      title: "*[review]*"
      author:
        include: ["alice@corp.com"]
      draft: false
      labels:
        any-of: ["run-agent"]
      source-branch: "feature/*"
      target-branch: "main"
      commit-message: "*[skip-agent]*"
      changed-files:
        include: ["src/**/*.rs"]
      min-changes: 5
      max-changes: 100
      time-window:
        start: "09:00"
        end: "17:00"
      build-reason:
        include: [PullRequest]
      expression: "eq(variables['Custom.Flag'], 'true')"  # raw ADO condition
steps:                         # inline steps before agent runs (same job, generate context)
  - bash: echo "Preparing context for agent"
    displayName: "Prepare context"
post-steps:                    # inline steps after agent runs (same job, process artifacts)
  - bash: echo "Processing agent outputs"
    displayName: "Post-steps"
setup:                         # separate job BEFORE agentic task
  - bash: echo "Setup job step"
    displayName: "Setup step"
teardown:                      # separate job AFTER safe outputs processing
  - bash: echo "Teardown job step"
    displayName: "Teardown step"
network:                       # optional network policy (standalone target only)
  allowed:                       # allowed host patterns and/or ecosystem identifiers
    - python                   # ecosystem identifier -- expands to Python/PyPI domains
    - "*.mycompany.com"        # raw domain pattern
  blocked:                     # blocked host patterns or ecosystems (removes from allow list)
    - "evil.example.com"
permissions:                   # optional ADO access token configuration
  read: my-read-arm-connection   # ARM service connection for read-only ADO access (Stage 1 agent)
  write: my-write-arm-connection # ARM service connection for write ADO access (Stage 3 executor only)
parameters:                    # optional ADO runtime parameters (surfaced in UI when queuing a run)
  - name: clearMemory
    displayName: "Clear agent memory"
    type: boolean
    default: false
# execution-context:          # always-on PR diff precompute (see docs/execution-context.md)
#   enabled: true             # master switch; default: true
#   pr:
#     enabled: true           # default: true when on.pr is configured; set false to opt out
---


## Build and Test

Build the project and run all tests...

Triggers (`on:`)

The on: field consolidates all trigger types under one key. Three sub-fields are supported — schedule, pipeline, and pr — and any combination of them is valid.

`on.schedule` — recurring schedule

Runs the pipeline on a repeating schedule. Accepts a human-friendly fuzzy expression:

on:
  schedule: daily around 14:00

See the Schedule Syntax guide for the full expression syntax, timezones, scattering, and day-of-week forms.

When schedule is set and on.pr is not explicitly configured, the compiler emits trigger: none and pr: none — the pipeline only runs on schedule, not on code pushes or PRs.

`on.pipeline` — pipeline completion trigger

Triggers the pipeline when another ADO pipeline finishes. Maps to an ADO pipelines resource.

on:
  pipeline:
    name: "Build Pipeline"       # source pipeline name (required)
    project: "OtherProject"      # only when in a different ADO project
    branches: [main, release/*]  # omit to trigger on any branch
    filters:                     # optional runtime gate — evaluated inside the Setup job
      source-pipeline: "Build*"  # glob on Build.TriggeredBy.DefinitionName
      branch: "refs/heads/main"  # glob on Build.SourceBranch

Field	Required	Description
`name`	Yes	Source pipeline name; maps to `source:` in the generated `pipelines:` resource block
`project`	No	ADO project that owns the source pipeline; omit when both pipelines are in the same project
`branches`	No	Branch filter; empty list triggers on any branch completing
`filters`	No	Runtime gate filters evaluated inside the Setup job (see table below)

on.pipeline.filters fields:

Field	Type	Description
`source-pipeline`	glob	Upstream pipeline name must match (`Build.TriggeredBy.DefinitionName`). Use `"Build*"` to match any pipeline whose name starts with `Build`.
`branch`	glob	Triggering branch ref must match (`Build.SourceBranch`).
`time-window.start` / `.end`	`HH:MM`	Only run during this UTC time window.
`build-reason.include`	list	Build reason must be in this list. Common values: `ResourceTrigger`, `Manual`.
`build-reason.exclude`	list	Build reason must NOT be in this list.
`expression`	ADO condition	Raw ADO condition applied to the Agent job `condition:` (not compiled to a gate step).

When pipeline is set and on.pr is not configured, CI push triggers and PR triggers are suppressed (trigger: none, pr: none).

`on.pr` — pull request trigger

Triggers the pipeline on pull request events. Supports two independent layers of filtering:

Layer	Field	Evaluated	Effect on unmatched builds
Native ADO	`branches:`, `paths:`	By ADO, before the pipeline starts	Pipeline is not queued at all — no runner consumed
Runtime gate	`filters:`	Inside the Setup job, after the pipeline starts	Gate script self-cancels the build

Use native ADO filters for broad exclusions (e.g. restrict to certain target branches). Use runtime gate filters for conditions that require runtime context: PR title pattern, author allowlist, label requirements, changed-file globs, time windows, draft status, and more.

on:
  pr:
    mode: synthetic              # synthetic (default) or policy — see below
    branches:
      include: [main, release/*]  # native ADO — only PRs targeting these branches
    paths:
      include: [src/*]            # native ADO — only PRs that touch these paths
    filters:                      # runtime gate — evaluated inside the Setup job
      title: "*[run-agent]*"
      draft: false
      labels:
        any-of: ["run-agent"]
      source-branch: "feature/*"

on.pr.filters fields:

Field	Type	Description
`title`	glob	PR title must match this glob pattern (e.g. `"[run-agent]"`).
`source-branch`	glob	Source branch ref must match (e.g. `"refs/heads/feature/"` or `"feature/"`).
`target-branch`	glob	Target branch ref must match (e.g. `"refs/heads/main"`).
`commit-message`	glob	Last commit message must match.
`draft`	boolean	`true` = only draft PRs; `false` = only non-draft PRs.
`author.include`	list	Author email must appear in this list.
`author.exclude`	list	Author email must NOT appear in this list.
`labels.any-of`	list	PR must have at least one of these labels.
`labels.all-of`	list	PR must have all of these labels.
`labels.none-of`	list	PR must NOT have any of these labels.
`changed-files.include`	list of globs	At least one changed file must match any pattern.
`changed-files.exclude`	list of globs	No changed file may match any pattern.
`min-changes`	integer	Minimum number of changed files (inclusive).
`max-changes`	integer	Maximum number of changed files (inclusive).
`time-window.start` / `.end`	`HH:MM`	Only run during this UTC time window.
`build-reason.include`	list	Build reason must be in this list. Common values: `PullRequest`, `BatchedCI`, `IndividualCI`, `Manual`.
`build-reason.exclude`	list	Build reason must NOT be in this list.
`expression`	ADO condition	Raw ADO condition applied to the Agent job `condition:` (not compiled to a gate step).

All filter fields are optional and combined with AND semantics — every configured field must pass. author, labels, and changed-files require a REST API call to the ADO PR endpoint; use native ADO branches: / paths: for broad exclusions that don’t need runtime context.

See the Filter IR reference for compilation details and validation rules.

on.pr.mode — Controls how the pipeline queues PR builds:

`mode`	CI `trigger:`	Use when
`synthetic` (default)	ADO default (all branches)	No Build Validation branch policy is installed. Setup synthesizes PR context from the ADO API. Recommended for most agents.
`policy`	`trigger: none`	Operator has installed an ADO Build Validation branch policy. Prevents duplicate CI builds.

Azure DevOps ignores the YAML pr: block for Azure Repos repositories unless a Build Validation branch policy is registered server-side. Without one, every push fires as Build.Reason = IndividualCI even when a PR is open — PR-aware agents silently degrade.

ado-aw offers two strategies:

mode: synthetic (default) — fires the pipeline on every push (ADO trigger: at its default). A Setup-job step calls the ADO REST API to find an open PR for the pushed branch:

PR found → promotes the build to PR semantics (AW_SYNTHETIC_PR=true), evaluates filters:, and stages aw-context/pr/ context for the agent.
No PR found → sets AW_SYNTHETIC_PR_SKIP=true and the Agent job self-skips cleanly — no noise, no red builds.

mode: policy — for when the operator has explicitly installed a Build Validation branch policy targeting this pipeline. The compiler emits trigger: none so pushes no longer queue duplicate CI builds alongside the policy-driven PR build. Every PR update fires exactly one Build.Reason = PullRequest build.

Trigger suppression

When on.schedule or on.pipeline is configured, the compiler emits trigger: none and pr: none to prevent the pipeline from also firing on every code push or PR. Setting on.pr explicitly re-enables the PR trigger regardless of whether schedule or pipeline is also set.

`on.schedule`	`on.pipeline`	`on.pr`	CI (push)	PR events
—	—	—	ADO default	ADO default
✓	—	—	`none`	`none`
—	✓	—	`none`	`none`
✓	✓	—	`none`	`none`
—	—	✓	ADO default	✓ enabled
✓	—	✓	`none`	✓ enabled
—	✓	✓	`none`	✓ enabled

Workspace Defaults

The workspace: field controls which directory the agent runs in. When it is not set explicitly, the compiler chooses a default based on which repositories are checked out (entries in repos: with checkout: true, which is the default):

If no additional repositories are checked out (i.e. only the pipeline’s own repository is checked out via the implicit self), workspace: defaults to root — the agent runs in the pipeline’s working directory root.
If one or more additional repositories are checked out, workspace: defaults to repo — the agent runs inside the trigger repository’s directory.

Set workspace: explicitly to root, repo (alias self), or a specific checked-out repository alias to override this behavior.

Repositories (`repos:`)

The repos: field provides a compact way to declare additional repository resources and control which ones the agent checks out. It replaces the legacy repositories: + checkout: pair.

Each entry can be:

Form	Syntax	Description
Shorthand	`- org/repo`	Alias derived from last segment, type=git, ref=refs/heads/main, checkout=true
Shorthand with alias	`- alias=org/repo`	Explicit alias before `=`
Object	`- name: org/repo`	Full control over all fields

Object fields:

Field	Default	Description
`name`	(required)	Full `org/repo` name (maps to ADO `name:`)
`alias`	last segment of `name`	Repository alias (maps to ADO `repository:`)
`type`	`git`	ADO repository resource type
`ref`	`refs/heads/main`	Branch or tag reference
`checkout`	`true`	Whether the agent job clones this repo

Examples

Three repos, all checked out (most common case):

repos:
  - my-org/tools
  - my-org/schemas
  - my-org/docs

Mixed: two checked out, one resource-only (used by templates):

repos:
  - my-org/tools
  - my-org/schemas
  - name: my-org/pipeline-templates
    checkout: false

Custom ref and explicit alias:

repos:
  - name: my-org/docs
    alias: docs-v2
    ref: refs/heads/release/2.x

Legacy syntax (auto-rewritten)

The legacy repositories: + checkout: fields are auto-converted to repos: by the repos_unified codemod. On the next ado-aw compile, any source that still uses the legacy fields is rewritten in place to the new shape — each repositories: entry becomes a repos: entry, with checkout: false added for entries that weren’t listed under checkout:. Mixing the legacy fields with an existing repos: block is rejected; pick one shape.

Custom Steps Injection

The steps, post-steps, setup, and teardown fields let you inject custom ADO pipeline steps at specific points in the compiled workflow’s execution flow.

Execution Order

Custom steps are inserted at these points in the three-stage pipeline:

flowchart TB
    subgraph SetupJob["Setup Job (optional)"]
        S2[Gate step]
        S1[setup steps]
    end
    subgraph AgentJob[Agent Job]
        A1[steps]
        A2[Run agent]
        A3[post-steps]
    end
    subgraph ExecutorJob[Executor Job]
        E1[Execute safe outputs]
    end
    subgraph TeardownJob[Teardown Job]
        T1[teardown steps]
    end
    S2 --> S1 --> A1 --> A2 --> A3 --> E1 --> T1

The Setup job is only created when on: filters or setup: steps are configured. When both are present, the gate step runs first — setup: steps are conditioned on the gate passing.

Field	Job	Position	Use Cases
`setup`	Setup (separate job)	After gate step (conditioned on gate when filters active)	Pre-flight checks, credentials setup, external service initialization
`steps`	Agent (inline)	Before agent runs	Generate context files, fetch external data, prepare workspace
`post-steps`	Agent (inline)	After agent completes	Process agent outputs, run validation, upload diagnostics
`teardown`	Teardown (separate job)	After safe outputs execute	Cleanup, notification, metrics collection

Field Types

All four fields accept ADO step arrays (YAML sequences). Each step can be any standard ADO task or script:

steps:
  - bash: echo "Inline bash step"
    displayName: "Prepare context"
  - task: DownloadSecureFile@1
    inputs:
      secureFile: "config.json"
    displayName: "Fetch config"

`steps:` — Pre-Agent Context Preparation

Runs before the agent in the same job. Use for generating context the agent needs:

steps:
  - bash: |
      git log --oneline -10 > /tmp/recent-commits.txt
      echo "Recent commits prepared for agent review"
    displayName: "Generate commit history"

The agent can then read /tmp/recent-commits.txt when forming its response.

`post-steps:` — Post-Agent Processing

Runs after the agent in the same job. Use for processing agent outputs or running validation:

post-steps:
  - bash: |
      if [ -f agent-output.json ]; then
        jq . agent-output.json || echo "Invalid JSON produced by agent"
      fi
    displayName: "Validate agent output"

`setup:` — Pre-Flight Setup Job

Runs in the Setup job (a separate job that executes before the Agent job). When on: filters are configured, the gate step runs first and setup: steps are automatically conditioned on the gate passing — they are skipped if the trigger doesn’t match your filters. When no filters are configured, setup: steps run unconditionally. Use for pre-flight infrastructure or workspace preparation the agent job depends on:

setup:
  - bash: |
      curl -X POST https://api.service.com/start-session \
        -H "Authorization: Bearer $TOKEN"
    displayName: "Initialize external service"
    env:
      TOKEN: $(ExternalServiceToken)

The Setup job (with setup: steps) always runs first, followed by Agent, then Executor, then Teardown.

`teardown:` — Post-Execution Cleanup Job

Runs as a separate job after safe outputs execute. Use for cleanup, notifications, or metrics:

teardown:
  - bash: |
      echo "Pipeline completed. Cleaning up resources."
      rm -rf /tmp/agent-workspace
    displayName: "Cleanup workspace"

Teardown steps run even if the agent or executor jobs fail (condition: always()).

Job Conditions

setup steps run unconditionally when no filters are configured; when on: filters are active, they are conditioned on the gate passing
steps (inline pre-agent) run unconditionally within the Agent job
post-steps run only if the agent job reaches that phase (condition: always() within the job)
teardown runs unconditionally after the executor job completes (condition: always())

Example: Full Custom Steps Workflow

---
name: "data-pipeline"
description: "Fetch, process, and report on external data"
on:
  schedule: daily around 06:00
pool:
  vmImage: ubuntu-22.04
setup:
  - bash: |
      curl -o /tmp/dataset.csv https://data.example.com/daily.csv
      echo "Dataset downloaded and ready"
    displayName: "Fetch external dataset"
steps:
  - bash: |
      wc -l /tmp/dataset.csv > /tmp/row-count.txt
      echo "Row count prepared for agent"
    displayName: "Generate dataset stats"
post-steps:
  - bash: |
      echo "Agent completed. Archiving results."
      tar -czf agent-results.tar.gz /tmp/agent-*.log
    displayName: "Archive logs"
  - task: PublishBuildArtifacts@1
    inputs:
      pathToPublish: "agent-results.tar.gz"
      artifactName: "results"
teardown:
  - bash: |
      curl -X POST https://webhooks.example.com/notify \
        -d '{"status":"complete","pipeline":"$(Build.DefinitionName)"}'
    displayName: "Send completion webhook"
---

## Data Pipeline Agent

Review the dataset statistics in `/tmp/row-count.txt`, process the data in
`/tmp/dataset.csv`, and summarize any anomalies or trends.

Inlined Imports

The inlined-imports: field controls when {{#runtime-import ...}} markers in the markdown body are resolved. It defaults to false. See the Runtime imports reference for the full marker syntax, path resolution rules, and runtime behavior.

When inlined-imports: false (the default), the compiler leaves runtime-import markers to be resolved on the pipeline runner. Prompt-body edits do not require recompiling the generated YAML — the pipeline fetches the latest prompt at runtime automatically.

When inlined-imports: true, the compiler resolves all runtime-import markers at compile time, including the implicit top-level marker that normally reloads the body itself. The emitted YAML contains the fully expanded prompt body, so the pipeline file is self-contained.

The trade-off is that the generated YAML is larger, and prompt-body edits require ado-aw compile plus committing the updated pipeline file.

Filter Validation

The compiler validates filter configurations at compile time and will emit errors for impossible or conflicting combinations:

Condition	Severity	Message
`min-changes` > `max-changes`	Error	No PR can satisfy both constraints
`time-window.start` = `time-window.end`	Error	Zero-width window never matches
Same value in `author.include` and `author.exclude`	Error	Conflicting include/exclude
Same value in `build-reason.include` and `build-reason.exclude`	Error	Conflicting include/exclude
Label in both `labels.any-of` and `labels.none-of`	Error	Label both required and blocked
Label in both `labels.all-of` and `labels.none-of`	Error	Label both required and blocked
Empty `labels` filter (no any-of/all-of/none-of)	Warning	No label checks applied

Errors cause compilation to fail. Fix the conflicting filter configuration before recompiling.

Filter Behavior Notes

Time Windows

Time windows use half-open intervals: [start, end). A window of start: "09:00", end: "17:00" matches from 09:00 up to but not including 17:00. A build triggered at exactly 17:00 UTC will not match.

Overnight windows are supported: start: "22:00", end: "06:00" matches from 22:00 through midnight to 05:59.

All times are evaluated in UTC.

Changed Files

The changed-files filter checks the list of files modified in the PR. If the PR has no changed files (empty diff) and an include pattern is set, the filter will not match. An exclude-only filter (no include) with no changed files passes vacuously (no excluded files are present).

Expression Escape Hatch

The expression field on pr.filters and pipeline.filters is an advanced, unsafe escape hatch. Its value is inserted verbatim into the Agent job’s ADO condition: field. It can reference any ADO pipeline variable, including secrets. The compiler validates against ##vso[ injection and ADO compile-time template expressions (${{), but otherwise trusts the value. Only use this if the built-in filters are insufficient.

Pipeline Requirements

The filter gate step uses System.AccessToken for self-cancellation (PATCH to the builds REST API) and PR metadata retrieval. This requires:

“Allow scripts to access the OAuth token” must be enabled on the pipeline definition in ADO (Project Settings -> Pipelines -> Settings).
The pipeline’s build service account must have permission to cancel builds.

If the token is unavailable, the gate step logs a warning and the build completes as “Succeeded” (with the agent job skipped via condition) rather than “Cancelled”.

Execution Context

The execution-context: block controls the always-on execution-context plugin that stages PR diff context on disk before the agent runs. For PR-triggered pipelines, it fetches the target branch and resolves the merge-base SHA, writes aw-context/pr/base.sha and aw-context/pr/head.sha, and appends a tailored prompt fragment — so the agent can run git diff $BASE..$HEAD directly without re-fetching anything.

execution-context:
  enabled: true  # master switch; default: true
  pr:
    enabled: true  # default: true when on.pr is configured; set false to opt out

When the block is omitted entirely, the PR contributor activates automatically whenever on.pr: is configured.

See the Execution Context reference for the full agent-visible layout, bash allow-list behavior, trust boundary, and migration notes.