Files
ai-sandbox/contrib/ai-sandbox.bash
T
ducoterra 144e322391 Add --publish: the one ingress control
Everything else in the file gates egress, which left an everyday request unanswered: the
agent starts a dev server inside the sandbox and a human wants to look at it. This puts a
listener on the host that forwards into the container, so a browser, curl or an API
tester reaches the server the sandboxed process runs.

`--publish [ADDR:]HOST:CONTAINER`, config `publish` and AISB_PUBLISH, repeatable, with the
cost named in the flag: it is ingress, so whatever that server serves is reachable from
the address it binds. The default address is 127.0.0.1 because a bare podman -p binds
every interface (measured) -- a port committed in a repo config must not quietly be a port
on the LAN. publish_addr changes the default machine-wide; a spec with a non-loopback
address warns on every run. The grammar is smaller than podman's on purpose: one port per
entry, no ranges, no /udp, no `*` -- this list is reviewed line by line, and typing
0.0.0.0 is the whole warning. An address means three parts, so `127.0.0.1:8000` is refused
rather than guessed. No -p alias: that flag belongs to the harness (claude -p prints).

Fail closed, as elsewhere: --net none cannot forward a port and podman discards the
mapping while starting the container anyway, so "it ran" would mean "nothing is
listening"; a host port already in use is named before the container starts, not after a
build; pick_port() will not hand the gate a port this run publishes. The container is
labelled with the ports it was given, and doctor reports them.

Inside, publish_rules() accepts tcp on the published ports in the input chain and never
the output one. Measured (docs/networking.md): pasta delivers the connection over
loopback, so that rule counts 0 packets on the reference host; it is there for a host or a
bridge network that delivers on the interface, and so that `nft list table inet aisb`
answers "what can reach this container". The ports are validated again inside the
entrypoint, because a ruleset is not somewhere to splice an unvalidated string. And the
measurement that makes a configured preview look broken: a server bound to 127.0.0.1
inside answers inside and refuses the published port outside, so dev servers must bind
0.0.0.0 -- both skills say so in the change that writes the port.

Tests. Unit: the grammar and every port list that looks right and is not, config/env/flag
precedence and dedup, the canonical spec in --print-policy, the `# ingress:` header, the
flags reaching the invocation before the image, egress enforcement byte-identical with a
port open, which chain the rule lands in and that a non-numeric port never reaches nft as
code. e2e (tests/e2e/13_publish.sh): one real container with enforce=nft where the host
gets its 200 and the same run still refuses a domain outside the allowlist at 403, the
server runs as uid 1000 with no capabilities so it cannot widen its own port, and the host
listener is gone when the container exits.

LLM-Generated: true
2026-10-30 22:53:57 -04:00

123 lines
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Executable File

# bash completion for ai-sandbox.
#
# Install (either):
# mkdir -p ~/.local/share/bash-completion/completions
# cp contrib/ai-sandbox.bash ~/.local/share/bash-completion/completions/ai-sandbox
# (it also registers ai-sandbox-autophase, which shares this file)
# or source it from ~/.bashrc -- put the `source` line *after* the alias, since
# bash needs `complete` registered under the alias name (`alias pi=ai-sandbox`).
#
# The flag list mirrors parse_args() in bin/ai-sandbox -- keep them in sync.
# compgen prints one candidate per line; reading them instead of dropping them through an
# unquoted $(...) keeps a candidate that contains a space (a file name, a phase directory)
# in one piece. Process substitution, not a pipe: COMPREPLY has to survive the call.
_aisb_fill() { local w; while IFS= read -r w; do COMPREPLY+=("$w"); done; }
_ai_sandbox_completions() {
local cur prev word first="" sub="" i
if type _get_comp_words_by_ref >/dev/null 2>&1; then
_get_comp_words_by_ref -n : cur prev
else
cur="${COMP_WORDS[COMP_CWORD]}"; prev="${COMP_WORDS[COMP_CWORD-1]:-}"
fi
local subs="build update doctor gate ps clean inspect version help"
# flags that consume the next word, so their values are not mistaken for
# positional (harness) arguments.
local value_flags=" --net --allow --allow-file --proxy --publish --mount --workdir --agents-dir
--env --env-file --base-image --install --harness --pi-token-env --cpus --memory
--pids --tmpfs-size --name --label "
# Walk the words before the cursor to find the subcommand, skipping option values.
local skip=0
for ((i = 1; i < COMP_CWORD; i++)); do
word="${COMP_WORDS[i]}"
if (( skip )); then skip=0; continue; fi
if [[ "$word" == --* && "$value_flags" == *" $word "* ]]; then skip=1; continue; fi
[[ "$word" == -* ]] && continue
[[ -z "$first" ]] && first="$word"
done
[[ " $subs " == *" $first "* ]] && sub="$first"
case "$prev" in # values of the flag just typed
--net) COMPREPLY=(); _aisb_fill < <(compgen -W "none allow full" -- "$cur"); return ;;
--harness) COMPREPLY=(); _aisb_fill < <(compgen -W "pi codex claude none" -- "$cur"); return ;;
--env) COMPREPLY=(); _aisb_fill < <(compgen -A export -- "$cur"); return ;;
--allow) # hosts already in the allow files; no DNS, no network
local hosts
hosts="$(sed 's/#.*//' "$HOME/.config/ai-sandbox/allow" ./.ai-sandbox/allow 2>/dev/null | tr ',[:space:]' '\n\n')"
COMPREPLY=(); _aisb_fill < <(compgen -W "$hosts" -- "$cur")
(( ${#COMPREPLY[@]} )) || COMPREPLY=( "$cur" ) # don't fall back to filenames
return ;;
--proxy|--publish) COMPREPLY=( "$cur" ); return ;; # values are ours to type, not to guess
--allow-file|--env-file) COMPREPLY=(); _aisb_fill < <(compgen -f -- "$cur"); return ;;
--workdir) COMPREPLY=(); _aisb_fill < <(compgen -W "auto" -- "$cur") # 'auto' mirrors the host path
(( ${#COMPREPLY[@]} )) || _aisb_fill < <(compgen -d -- "$cur"); return ;;
--mount|--agents-dir) COMPREPLY=(); _aisb_fill < <(compgen -d -- "$cur"); return ;;
esac
# A non-flag word before the cursor that is not a subcommand means the rest goes
# to the harness: ai-sandbox stops parsing there, so offer nothing, not sandbox flags.
[[ -n "$first" && -z "$sub" ]] && return 1
[[ -z "$first" && "$cur" != -* ]] && { COMPREPLY=(); _aisb_fill < <(compgen -W "$subs" -- "$cur"); return; }
# subcommand-specific flags (each subcommand dies on anything else);
# `inspect` takes the full policy flag set, so it falls through to the list below.
case "$sub" in
build) COMPREPLY=(); _aisb_fill < <(compgen -W "--rebuild -f --refresh-base -B --gate" -- "$cur"); return ;;
update) COMPREPLY=(); _aisb_fill < <(compgen -W "--check --no-gate" -- "$cur"); return ;;
doctor) COMPREPLY=(); _aisb_fill < <(compgen -W "--deep -d" -- "$cur"); return ;;
clean) COMPREPLY=(); _aisb_fill < <(compgen -W "--all -a --volumes -V" -- "$cur"); return ;;
gate) COMPREPLY=(); _aisb_fill < <(compgen -W "up down status logs" -- "$cur"); return ;;
ps|version) return 1 ;;
esac
COMPREPLY=()
_aisb_fill < <(compgen -W \
"--net --allow --allow-file --proxy --no-gate --publish --mount --no-cwd --workdir --home-cache --ephemeral-home --read-only --agents --no-agents --agents-dir --env --env-file --base-image --install --harness --pi-token-env --no-pi-token-env --no-pi-config --cpus --memory --pids --tmpfs-size --shell --interactive --no-interactive --no-tty --keep --name --label --no-build --dry-run --print-policy --print-entrypoint --print-containerfile --allow-unenforced --insecure-keep-root --strict-args -h --help -V" \
-- "$cur")
}
# ai-sandbox-autophase: the pipeline driver. Its own flag list, mirroring its parser.
_ai_sandbox_autophase_completions() {
local cur
if type _get_comp_words_by_ref >/dev/null 2>&1; then
_get_comp_words_by_ref -n : cur
else
cur="${COMP_WORDS[COMP_CWORD]}"
fi
case "$cur" in
--validate-in=*) COMPREPLY=(); _aisb_fill < <(compgen -W "sandbox host" -- "${cur#*=}"); return ;;
esac
COMPREPLY=()
_aisb_fill < <(compgen -W \
"--pi-cmd --rc-files --lib --skill-dir --sandbox-args --validate-in --no-push --no-preflight --no-notes --trust-git-changes --unit --phase --max-units --status --dry-run -n -h --help -V" \
-- "$cur")
# --unit and --phase name pending work: offer the phase directories first, then the
# ordinary file completion the caller would otherwise have got.
local todo="${PWD}/.agents/phases/todo"
case "${COMP_WORDS[COMP_CWORD-1]}" in
--unit|--phase)
if [[ -d "$todo" ]]; then
local d
for d in "$todo"/"$cur"*; do
[[ -e "$d" ]] && COMPREPLY+=("${d#"$todo"/}") # named as the driver wants them
done
_aisb_fill < <(compgen -f -- "$cur")
fi ;;
esac
}
complete -o default -F _ai_sandbox_completions ai-sandbox 2>/dev/null || true
complete -o default -F _ai_sandbox_autophase_completions ai-sandbox-autophase 2>/dev/null || true
if [[ $- == *i* ]]; then # also complete the harness alias
for _aisb in $(compgen -A alias 2>/dev/null); do
if alias "$_aisb" 2>/dev/null | grep -q 'ai-sandbox'; then
complete -o default -F _ai_sandbox_completions "$_aisb" 2>/dev/null || true
fi
done
unset _aisb
fi