autonomous-agent-bootstrap

A single idempotent bash script that turns a fresh Linux host into a ready-to-use Claude Code and Codex agent environment. Built for Brev VMs but works on any Ubuntu/Debian host.

What It Sets Up

1. Claude Code via the official native installer, configured for unattended use with bypassPermissions, sandbox mode, debug logging, skipped onboarding, and pre-approved first-party API-key fingerprints when provided.
2. Codex CLI via OpenAI's standalone installer, configured with approval_policy = "never", sandbox_mode = "danger-full-access", trusted project roots, live web search, shell env inheritance, service tier, reasoning effort, and [agents].max_threads.
3. AAB env file at ~/.aab/.env for provider selection, model names, and credentials. The bootstrap keeps these out of ~/.bashrc and /etc/environment.
4. Wrapper families in ~/.local/bin, with the selected claude entrypoint installed as a regular launcher file in ~/.local/aab-bin (kept ahead of ~/.local/bin on PATH so the native auto-updater, which owns ~/.local/bin/claude, cannot shadow the wrapper):
   • ~/.local/aab-bin/claude plus explicit claude-first-party, claude-third-party-anthropic, claude-third-party-deepseek, and claude-third-party-nemotron launchers
   • codex plus explicit codex-first-party and codex-third-party-openai launchers
5. Brev CLI, with optional brev login --api-key ... --org-id ... when AAB_BREV_API_KEY and AAB_BREV_ORG_ID are set.
6. gh CLI, installed from the official cli.github.com apt repo.
7. git, with optional author identity, GitHub credential helper, SSH auth key, and SSH signing key.
8. Global git-identity enforcement — an agent rule in every harness's global instruction file plus a global git hook that rejects commits whose identity does not match the configured git config. See Git Identity Enforcement.
9. Agent plugins listed in agent_plugins.txt, installed into both Claude Code and Codex.

Requirements

• Ubuntu/Debian host with bash and apt-get
• Passwordless sudo, or run as root
• A bare ubuntu:22.04 image is valid; the bootstrap installs curl, python3, git, tar, gawk, ripgrep, sudo, ca-certificates, and gh

Quick Start

Create a config file with the settings you want, then run the bootstrap:

cat > /tmp/aab.conf <<'CONF'
AAB_CLAUDE_CODE_INFERENCE_PROVIDER=first-party
AAB_CLAUDE_CODE_FIRST_PARTY_MODEL=claude-opus-4-7
AAB_CLAUDE_CODE_EFFORT=max
AAB_CLAUDE_CODE_FIRST_PARTY_API_KEY=...

AAB_CODEX_INFERENCE_PROVIDER=first-party
AAB_CODEX_FIRST_PARTY_MODEL=gpt-5.5
AAB_CODEX_FIRST_PARTY_API_KEY=...
AAB_CODEX_EFFORT=xhigh
AAB_CODEX_SERVICE_TIER=priority
AAB_CODEX_AGENT_MAX_THREADS=16

AAB_BREV_API_KEY=...
AAB_BREV_ORG_ID=...
AAB_GH_TOKEN=...
AAB_GIT_AUTHOR_NAME=Your Name
AAB_GIT_AUTHOR_EMAIL=you@example.com
CONF

curl -fsSL https://raw.githubusercontent.com/brycelelbach/autonomous-agent-bootstrap/main/bootstrap.bash | bash -s -- /tmp/aab.conf
source ~/.bashrc
claude -p "Say hello from Claude Code"
codex exec "Say hello from Codex"

You can also pass the same keys as exported environment variables or pipe config on stdin. The file is sourced as bash, so quote values containing shell metacharacters.

Provider Selection

AAB_CLAUDE_CODE_INFERENCE_PROVIDER controls which wrapper behavior the unqualified claude launcher uses:

• first-party
• third-party-anthropic
• third-party-deepseek
• third-party-nemotron

AAB_CODEX_INFERENCE_PROVIDER controls which wrapper behavior the unqualified codex launcher uses:

• first-party
• third-party-openai

The explicit wrappers are always installed, so you can run claude-third-party-deepseek or codex-third-party-openai directly regardless of the default launcher. To change the unqualified claude or codex command, update your config and re-run the bootstrap. AAB writes the unqualified commands as regular executable wrapper files, not shell aliases, so type claude should resolve to ~/.local/aab-bin/claude and type codex to ~/.local/bin/codex.

Third-Party Claude Examples

AAB_CLAUDE_CODE_INFERENCE_PROVIDER=third-party-anthropic
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_BASE_URL=https://gateway.example.com
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_API_KEY=...
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_MODEL=aws/anthropic/bedrock-claude-opus-4-7
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_HAIKU_MODEL=aws/anthropic/claude-haiku-4-5-v1
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_SONNET_MODEL=aws/anthropic/bedrock-claude-sonnet-4-6
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_OPUS_MODEL=aws/anthropic/bedrock-claude-opus-4-7

AAB_CLAUDE_CODE_INFERENCE_PROVIDER=third-party-deepseek
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_BASE_URL=https://deepseek-gateway.example.com
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_API_KEY=...
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_MODEL=deepseek-reasoner
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_HAIKU_MODEL=deepseek-chat
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_SONNET_MODEL=deepseek-chat
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_OPUS_MODEL=deepseek-reasoner

AAB_CLAUDE_CODE_INFERENCE_PROVIDER=third-party-nemotron
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_BASE_URL=https://inference-api.nvidia.com
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_API_KEY=...
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_MODEL=nvidia/nvidia/nemotron-3-ultra
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_HAIKU_MODEL=nvidia/nvidia/nemotron-3-ultra
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_SONNET_MODEL=nvidia/nvidia/nemotron-3-ultra
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_OPUS_MODEL=nvidia/nvidia/nemotron-3-ultra

Third-Party Codex Example

AAB_CODEX_INFERENCE_PROVIDER=third-party-openai
AAB_CODEX_THIRD_PARTY_OPENAI_BASE_URL=https://inference-api.nvidia.com/v1
AAB_CODEX_THIRD_PARTY_OPENAI_API_KEY=...
AAB_CODEX_THIRD_PARTY_OPENAI_MODEL=openai/openai/gpt-5.5

Environment Variables

All variables are optional unless you select a provider that needs its credential.

Variable	Effect
AAB_CLAUDE_CODE_INFERENCE_PROVIDER	first-party, third-party-anthropic, third-party-deepseek, or third-party-nemotron. Selects the unqualified claude launcher behavior. Defaults to first-party.
AAB_CLAUDE_CODE_FIRST_PARTY_API_KEY	Anthropic first-party API key. Stored in ~/.aab/.env; mapped to ANTHROPIC_API_KEY by claude-first-party.
AAB_CLAUDE_CODE_FIRST_PARTY_MODEL	Claude first-party model. Defaults to claude-opus-4-7.
AAB_CLAUDE_CODE_FIRST_PARTY_HAIKU_MODEL	First-party haiku-tier model. Defaults to claude-haiku-4-5.
AAB_CLAUDE_CODE_FIRST_PARTY_SONNET_MODEL	First-party sonnet-tier model. Defaults to claude-sonnet-4-6.
AAB_CLAUDE_CODE_FIRST_PARTY_OPUS_MODEL	First-party opus-tier model. Defaults to claude-opus-4-7.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_BASE_URL	Anthropic-compatible third-party base URL for Claude.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_API_KEY	Third-party Anthropic-compatible API key. Mapped to ANTHROPIC_AUTH_TOKEN.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_MODEL	Third-party Anthropic-compatible default model.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_HAIKU_MODEL	Third-party Anthropic-compatible haiku-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_SONNET_MODEL	Third-party Anthropic-compatible sonnet-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_ANTHROPIC_OPUS_MODEL	Third-party Anthropic-compatible opus-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_BASE_URL	DeepSeek gateway base URL for Claude.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_API_KEY	DeepSeek gateway API key. Mapped to ANTHROPIC_AUTH_TOKEN.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_MODEL	DeepSeek default model.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_HAIKU_MODEL	DeepSeek haiku-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_SONNET_MODEL	DeepSeek sonnet-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_DEEPSEEK_OPUS_MODEL	DeepSeek opus-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_BASE_URL	Nemotron gateway base URL for Claude.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_API_KEY	Nemotron gateway API key. Mapped to ANTHROPIC_AUTH_TOKEN.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_MODEL	Nemotron default model.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_HAIKU_MODEL	Nemotron haiku-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_SONNET_MODEL	Nemotron sonnet-tier model.
AAB_CLAUDE_CODE_THIRD_PARTY_NEMOTRON_OPUS_MODEL	Nemotron opus-tier model.
AAB_CLAUDE_CODE_EFFORT	Claude Code effort level. Defaults to max.
AAB_CODEX_INFERENCE_PROVIDER	first-party or third-party-openai. Selects the unqualified codex launcher behavior. Defaults to first-party.
AAB_CODEX_FIRST_PARTY_API_KEY	OpenAI API key for first-party Codex. Stored in ~/.aab/.env, mapped to OPENAI_API_KEY by codex-first-party, and used for codex login --with-api-key.
AAB_CODEX_FIRST_PARTY_MODEL	Codex first-party model. Defaults to gpt-5.5.
AAB_CODEX_THIRD_PARTY_OPENAI_BASE_URL	OpenAI-compatible third-party base URL for Codex. Defaults to https://inference-api.nvidia.com/v1.
AAB_CODEX_THIRD_PARTY_OPENAI_API_KEY	OpenAI-compatible third-party API key for Codex.
AAB_CODEX_THIRD_PARTY_OPENAI_MODEL	Codex third-party OpenAI-compatible model. Defaults to openai/openai/gpt-5.5.
AAB_CODEX_EFFORT	Codex reasoning effort: minimal, low, medium, high, or xhigh. Defaults to xhigh.
AAB_CODEX_SERVICE_TIER	Codex service tier: priority, flex, default, or fast as an alias for priority. Defaults to priority.
AAB_CODEX_AGENT_MAX_THREADS	Maximum number of concurrently open Codex subagent threads. Defaults to 16.
AAB_BREV_API_KEY	Brev organization-scoped API key. Used with AAB_BREV_ORG_ID.
AAB_BREV_ORG_ID	Brev organization ID paired with AAB_BREV_API_KEY.
AAB_GH_TOKEN	GitHub token. Stored in ~/.aab/.env; wrappers map it to GH_TOKEN for agent subprocesses.
AAB_GIT_AUTHOR_NAME	git config --global user.name.
AAB_GIT_AUTHOR_EMAIL	git config --global user.email.
AAB_GH_AUTH_SSH_PRIVATE_KEY_B64	Base64-encoded OpenSSH private key for GitHub SSH auth.
AAB_GIT_SSH_SIGNING_PRIVATE_KEY_B64	Base64-encoded OpenSSH private key for git commit/tag signing.
AAB_AGENT_PLUGINS_FILE	Path to a local plugin marketplace list.
AAB_AGENT_PLUGINS_URL	URL for the plugin marketplace list when no local file is used.

What the Script Touches

Path	How
~/.aab/.env	Rewritten with provider config, model names, and credentials. Mode 0600; parent directory mode 0700.
~/.local/aab-bin/claude	Claude launcher file for the selected provider; on PATH ahead of ~/.local/bin.
~/.local/bin/claude	Left as the native installer's binary so the auto-updater can repoint it.
~/.local/bin/claude-first-party	Claude wrapper for first-party Anthropic.
~/.local/bin/claude-third-party-anthropic	Claude wrapper for Anthropic-compatible third-party gateways.
~/.local/bin/claude-third-party-deepseek	Claude wrapper for DeepSeek gateways.
~/.local/bin/claude-third-party-nemotron	Claude wrapper for Nemotron gateways.
~/.local/bin/claude-aab-real	Symlink to ~/.local/bin/claude, so wrappers exec whatever the updater installs.
~/.local/bin/codex	Codex launcher file with the selected provider behavior.
~/.local/bin/codex-first-party	Codex wrapper for first-party OpenAI.
~/.local/bin/codex-third-party-openai	Codex wrapper for OpenAI-compatible third-party gateways.
~/.local/bin/codex-aab-real	Link or moved copy of the real Codex binary.
~/.claude/settings.json	Rewritten with unattended Claude defaults and plugin entries; existing file is backed up.
~/.claude.json	Merged with onboarding and optional API-key approval state; existing file is backed up.
~/.codex/config.toml	Rewritten with unattended Codex defaults and selected provider config while preserving Codex plugin tables; existing file is backed up.
~/.codex/auth.json	Written by codex login --with-api-key when first-party Codex API-key auth is configured.
~/.bashrc	Managed block for PATH and non-secret unattended-mode exports only.
~/.profile	Managed block that keeps ~/.local/aab-bin ahead of ~/.local/bin for login shells.
/etc/environment	Existing AAB managed blocks are removed so credentials do not remain there.
~/.brev/credentials.json	Written by brev login --api-key ... --org-id ... when Brev credentials are configured.
~/.brev/onboarding_step.json	Written to skip the Brev tutorial.
~/.gitconfig	git identity, GitHub credential helper, core.hooksPath for identity enforcement, and optional SSH signing config.
~/.ssh/id_aab_auth, ~/.ssh/config	Written only when AAB_GH_AUTH_SSH_PRIVATE_KEY_B64 is set.
~/.ssh/id_aab_signing	Written only when AAB_GIT_SSH_SIGNING_PRIVATE_KEY_B64 is set.
~/.aab/git-hooks/	Global git hook dispatcher and per-hook-name symlinks that enforce the configured commit identity. core.hooksPath points here. See Git Identity Enforcement.
~/.claude/CLAUDE.md, ~/.codex/AGENTS.md	Managed block carrying the git-identity agent rule; other content is preserved.

SSH Keys

The bootstrap handles two independent optional SSH-key variables:

Env var	Role
AAB_GH_AUTH_SSH_PRIVATE_KEY_B64	GitHub authentication for clone/push/pull over SSH.
AAB_GIT_SSH_SIGNING_PRIVATE_KEY_B64	git commit and tag signing only.

Generate and encode a key:

ssh-keygen -t ed25519 -C "you@example.com" -f ~/.ssh/new_key -N ""
base64 -w0 < ~/.ssh/new_key

Set the encoded private key on the relevant AAB variable, and upload the public key to GitHub as either an authentication key, a signing key, or both.

Git Identity Enforcement

The bootstrap configures a global git author, email, and (optionally) a commit-signing key, but unattended agents routinely commit under their own identity anyway — via git -c user.email=..., git commit --author=..., GIT_AUTHOR_* / GIT_COMMITTER_* environment variables, or a repo-local git config user.email. Two layers keep commits on the configured identity:

1. An agent rule is written to each harness's global instruction file — ~/.claude/CLAUDE.md for Claude Code and ~/.codex/AGENTS.md for Codex — both of which are loaded in every repository. The rule tells the agent to always commit with the configured identity and to leave the global git config alone. The rule lives inside a managed block (# >>> autonomous-agent-bootstrap >>> … # <<< autonomous-agent-bootstrap <<<), so re-running the bootstrap replaces it in place and any other content in those files is preserved.
2. A global git hook makes the rule non-optional. The bootstrap installs a dispatcher at ~/.aab/git-hooks/aab-git-hook, symlinks it under each managed hook name, and points core.hooksPath at that directory. On pre-commit the dispatcher compares the commit's resolved author and committer identity (git var GIT_AUTHOR_IDENT / GIT_COMMITTER_IDENT) against the global user.name / user.email, and rejects the commit on a mismatch. When the global config requires signing (commit.gpgsign=true), it also rejects commits that disable signing via config or swap the signing key. The expected values are read from --global, which a per-invocation -c, an environment variable, or a repo-local config cannot override.

Because a global core.hooksPath replaces — rather than supplements — a repository's own .git/hooks, the dispatcher chains through to the repo's hook of the same name after its own checks pass, so projects that ship their own hooks (Husky, pre-commit, lint-staged, …) keep working.

The enforcement is intentionally scoped to identity and signing. It does not try to defeat the deliberate per-commit escape hatches git provides — git commit --no-verify skips all hooks, and --no-gpg-sign skips signing — which remain available for the rare legitimate case.

If no global user.name / user.email is configured, the hook is a no-op: there is nothing to enforce against, so all commits pass.

Running the Tests

All tests are driven by ./test.bash.

./test.bash              # lint + unit
./test.bash --lint       # bash -n + shellcheck
./test.bash --unit       # bats suite
./test.bash --e2e        # destructive host e2e
./test.bash --docker     # e2e in a fresh ubuntu:22.04 container
./test.bash --smoke      # live Claude + Codex inference smoke
./test.bash --secrets    # gitleaks scan
./test.bash --all        # lint + unit + e2e + secrets

--e2e modifies the current $HOME and should only be run on a disposable machine. --docker is the safe bare-image check. --smoke spends real inference using the credentials in the current environment or the AAB wrapper configuration.