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feat(fleet): brain-home split — fleet state under ~/.mosaic, templates stay config-home (#1298)
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Co-authored-by: Jason Woltje <[email protected]>
This commit was merged in pull request #1298.
This commit is contained in:
jason.woltje
2026-08-18 03:23:15 +00:00
committed by jarvis
parent 8199261caa
commit a80bae950d
16 changed files with 498 additions and 21 deletions
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packages/mosaic/framework/tools/fleet/test-start-agent-session.sh
+48
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@@ -167,6 +167,54 @@ if echo "$valid_args" | grep -qF 'bash -c'; then
fail "launcher constructed a shell command payload"
fi
# ── Brain-home split (canon §2) ─────────────────────────────────────────
# When MOSAIC_HOME is the default config home under $HOME and the host carries
# $HOME/.mosaic/fleet/agents, seat envs resolve from the brain tree; the config
# home still owns fleet/run (holder-owner) and remains a managed boundary.
: > "$TMUX_CALLS"
HOME_BRAIN="$ROOT/brain-home"
CONFIG_HOME="$HOME_BRAIN/.config/mosaic"
BRAIN="$HOME_BRAIN/.mosaic"
mkdir -p "$CONFIG_HOME/fleet/run" "$BRAIN/fleet/agents" "$HOME_BRAIN/work"
chmod 700 "$CONFIG_HOME" "$CONFIG_HOME/fleet" "$CONFIG_HOME/fleet/run" \
"$BRAIN/fleet/agents" "$HOME_BRAIN/work"
printf '123e4567-e89b-12d3-a456-426614174000\n' > "$CONFIG_HOME/fleet/run/holder-owner"
chmod 600 "$CONFIG_HOME/fleet/run/holder-owner"
cat > "$BRAIN/fleet/agents/coder-brain.env.generated" <<EOF
MOSAIC_AGENT_NAME=coder-brain
MOSAIC_AGENT_CLASS=code
MOSAIC_AGENT_RUNTIME=pi
MOSAIC_AGENT_MODEL=openai-codex/gpt-5.6-sol
MOSAIC_AGENT_REASONING=high
MOSAIC_AGENT_TOOL_POLICY=code
MOSAIC_AGENT_WORKDIR=$HOME_BRAIN/work
MOSAIC_TMUX_SOCKET=mosaic-test
EOF
chmod 600 "$BRAIN/fleet/agents/coder-brain.env.generated"
install_pane_binaries "$HOME_BRAIN"
HOME="$HOME_BRAIN" PATH="$FAKE_BIN:$PATH" MOSAIC_TEST_TMUX_CALLS="$TMUX_CALLS" \
MOSAIC_TEST_PANE_PID=$$ MOSAIC_TEST_HOME="$HOME_BRAIN" \
MOSAIC_TEST_FLEET_OWNER=123e4567-e89b-12d3-a456-426614174000 \
MOSAIC_HOME="$CONFIG_HOME" "$START" coder-brain
brain_args=$(tr '\0' '\n' < "$TMUX_CALLS")
echo "$brain_args" | grep -qF new-session || fail "brain-home generated projection did not reach tmux"
echo "$brain_args" | grep -qF 'coder-brain' || fail "brain-home agent env was not the launch source"
[ -f "$BRAIN/fleet/agents/coder-brain.env.generated" ] || fail "brain generated env vanished"
# Negative control: the SAME default-config-home shape but without
# ~/.mosaic/fleet/agents — the config-home env tree is used directly (legacy).
: > "$TMUX_CALLS"
HOME_NOBRAIN="$ROOT/brainless-home"
CONFIG_HOME_NOBRAIN="$HOME_NOBRAIN/.config/mosaic"
write_generated "$CONFIG_HOME_NOBRAIN" "coder-legacy"
install_pane_binaries "$HOME_NOBRAIN"
HOME="$HOME_NOBRAIN" PATH="$FAKE_BIN:$PATH" MOSAIC_TEST_TMUX_CALLS="$TMUX_CALLS" \
MOSAIC_TEST_PANE_PID=$$ MOSAIC_TEST_HOME="$HOME_NOBRAIN" \
MOSAIC_TEST_FLEET_OWNER=123e4567-e89b-12d3-a456-426614174000 \
MOSAIC_HOME="$CONFIG_HOME_NOBRAIN" "$START" coder-legacy
legacy_args=$(tr '\0' '\n' < "$TMUX_CALLS")
echo "$legacy_args" | grep -qF new-session || fail "legacy single-tree launch regressed"
# The pane must start through an absolute clean-environment boundary. Its
# runtime command remains an argv vector, but no holder/session environment
# control variable can pass through the pane command.