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fix: feat: SessionStart compact hook re-injects phase protocol after context compaction (#274)

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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
openhands 2026-03-20 23:27:32 +00:00
parent 5c960f1b6e
commit e3895ad3ac
7 changed files with 86 additions and 8 deletions
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43
lib/agent-session.sh
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@ -218,6 +218,39 @@ create_agent_session() {
fi
rm -f "$exit_marker"
# Install SessionStart hook for context re-injection after compaction:
# when Claude Code compacts context during long sessions, the phase protocol
# instructions are lost. This hook fires after each compaction and outputs
# the content of a context file so Claude retains critical instructions.
# The context file is written by callers via write_compact_context().
if [ -n "$phase_file" ]; then
local compact_hook_script="${FACTORY_ROOT}/lib/hooks/on-compact-reinject.sh"
if [ -x "$compact_hook_script" ]; then
local context_file="${phase_file%.phase}.context"
local compact_hook_cmd="${compact_hook_script} ${context_file}"
if [ -f "$settings" ]; then
jq --arg cmd "$compact_hook_cmd" '
if (.hooks.SessionStart // [] | any(.[]; .hooks[]?.command == $cmd))
then .
else .hooks.SessionStart = (.hooks.SessionStart // []) + [{
matcher: "compact",
hooks: [{type: "command", command: $cmd}]
}]
end
' "$settings" > "${settings}.tmp" && mv "${settings}.tmp" "$settings"
else
jq -n --arg cmd "$compact_hook_cmd" '{
hooks: {
SessionStart: [{
matcher: "compact",
hooks: [{type: "command", command: $cmd}]
}]
}
}' > "$settings"
fi
fi
fi
# Install Stop hook for Matrix streaming: when MATRIX_THREAD_ID is set,
# each Claude response is posted to the Matrix thread so humans can follow.
local matrix_hook_script="${FACTORY_ROOT}/lib/hooks/on-stop-matrix.sh"
@ -392,6 +425,16 @@ monitor_phase_loop() {
done
}
# Write context to a file for re-injection after context compaction.
# The SessionStart compact hook reads this file and outputs it to stdout.
# Args: phase_file content
write_compact_context() {
local phase_file="$1"
local content="$2"
local context_file="${phase_file%.phase}.context"
printf '%s\n' "$content" > "$context_file"
}
# Kill a tmux session gracefully (no-op if not found).
agent_kill_session() {
local session="${1:-}"