Files
skills/phased-execution/scripts/lib.sh
T
ducoterra 85ac0d61b9 feat: phases + tasks — per-task execution with phase directories
- A phase is now a directory: 00_phase.md (overview + task index) plus
  small, quick NN_task.md task files; complete/ mirrors todo/
- Task is the unit of execution: run-task.sh (one unit), run-phase.sh
  (phase to completion incl. 00_phase.md final pass), auto-phase.sh
  (all units in order); validate.sh gate runs after every task
- PHASE_COMMIT commits at phase boundaries (00_phase.md / legacy file moves)
- Legacy flat todo/NN_name.md files still execute as a single unit;
  new migrate-phases-to-tasks.sh converts them to the directory layout
- phase-status.sh reports per-task state and the next unit
- New task-template.md; phase templates now carry a Tasks index
2026-08-23 19:28:01 -04:00

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#!/usr/bin/env bash
# lib.sh — shared logic for the phased-execution skill.
# Sourced by run-task.sh, run-phase.sh, and auto-phase.sh. Not meant to be run directly.
#
# Phase state lives in files, not chat context:
# .agent/PLAN.md master plan, LOCKED DECISIONS (binding)
# .agent/phases/todo/NN_name/ pending phase: 00_phase.md (overview) + NN_task.md task files
# .agent/phases/todo/NN_name.md legacy single-file phase (still executable)
# .agent/phases/complete/ finished phases — mirrors the todo/ layout
# .agent/reports/ per-task executor reports, stderr, validation logs
# .agent/phase-sessions/ child pi session files (resumable fixers)
#
# The unit of execution is the TASK: each task file runs in its own pi
# subprocess (fresh context) with bounded fixer retries, and
# .agent/validate.sh runs after EVERY task. A unit only moves to complete/
# after the child exits 0, the child's stream ends with a clean final
# report, and validation passes. When all of a phase's tasks are done,
# 00_phase.md runs as the phase's final pass (any remaining inline work +
# completion criteria + phase-level verification); moving it completes the
# phase and is the PHASE_COMMIT commit point.
SKILL_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
EXECUTOR_PROMPT_FILE="$SKILL_DIR/assets/executor-prompt.md"
TASK_EXECUTOR_PROMPT_FILE="$SKILL_DIR/assets/task-executor-prompt.md"
PHASE_FINAL_PROMPT_FILE="$SKILL_DIR/assets/phase-final-prompt.md"
PHASE_TODO=".agent/phases/todo"
PHASE_DONE=".agent/phases/complete"
PHASE_REPORTS=".agent/reports"
PHASE_SESSIONS=".agent/phase-sessions"
MAX_FIX_ATTEMPTS="${MAX_FIX_ATTEMPTS:-3}"
warn() { echo "⚠ $*" >&2; }
die() { echo "✗ ERROR: $*" >&2; exit 1; }
# --- project root -------------------------------------------------------------
# Walk up from $PWD to the nearest directory containing .agent/phases/todo.
find_root() {
local d
d="$(pwd)"
while :; do
if [[ -d "$d/.agent/phases/todo" ]]; then printf '%s\n' "$d"; return 0; fi
[[ "$d" == "/" ]] && return 1
d="$(dirname "$d")"
done
}
# --- unit selection -------------------------------------------------------------
# A unit is the smallest schedulable piece of work, referenced relative to
# .agent/phases/todo/:
# directory phase → each task file "NN_name/NN_task.md" (sort order), then
# the phase overview "NN_name/00_phase.md" as the final pass
# legacy flat → the phase file itself, "NN_name.md"
# Pending phase entries in todo/ (phase directories or legacy .md files), in execution order.
phase_entries() {
( cd "$PHASE_TODO" 2>/dev/null && ls -1 | grep -E '^[0-9]' | sort ) || true
}
# First pending unit of one phase entry, or empty when the phase is done.
phase_next_unit() {
local p="$1" t
if [[ -d "$PHASE_TODO/$p" ]]; then
t="$(ls -1 "$PHASE_TODO/$p" 2>/dev/null | grep -E '^[0-9].*\.md$' | grep -vE '^00_phase\.md$' | sort | head -n1)"
if [[ -n "$t" ]]; then printf '%s/%s\n' "$p" "$t"; return 0; fi
if [[ -f "$PHASE_TODO/$p/00_phase.md" ]]; then printf '%s/00_phase.md\n' "$p"; return 0; fi
elif [[ -f "$PHASE_TODO/$p" ]]; then
printf '%s\n' "$p"
fi
return 0
}
# Next pending unit in the whole pipeline, or empty when everything is done.
next_unit() {
local p u
for p in $(phase_entries); do
u="$(phase_next_unit "$p")"
if [[ -n "$u" ]]; then printf '%s\n' "$u"; return 0; fi
done
return 0
}
# Count of pending units across all phases (task files + 00_phase.md + legacy files).
count_units() {
local p n=0
for p in $(phase_entries); do
if [[ -d "$PHASE_TODO/$p" ]]; then
n=$(( n + $(ls -1 "$PHASE_TODO/$p" 2>/dev/null | grep -cE '\.md$') ))
elif [[ -f "$PHASE_TODO/$p" ]]; then
n=$(( n + 1 ))
fi
done
printf '%s\n' "$n"
}
# Name used in reports/sessions: "NN_name__NN_task" (dir phases) or "NN_name" (flat).
unit_base() {
local u="${1%.md}"
printf '%s\n' "${u//\//__}"
}
# Phase name for a unit (both forms).
unit_phase() {
local u="${1%.md}"
printf '%s\n' "${u%%/*}"
}
# Reports directory for a unit: per-phase subdir for dir phases, flat otherwise.
unit_report_dir() {
local u="$1"
if [[ "$u" == */* ]]; then
printf '%s/%s\n' "$PHASE_REPORTS" "$(unit_phase "$u")"
else
printf '%s\n' "$PHASE_REPORTS"
fi
}
# Report/log path for a unit attempt: <dir>/<base>.a<attempt>.<ext>.
unit_report() {
local u="$1" attempt="$2" ext="$3"
printf '%s/%s.a%s.%s\n' "$(unit_report_dir "$u")" "$(unit_base "$u")" "$attempt" "$ext"
}
# Phase-end unit (the commit point): 00_phase.md, or the whole file for legacy.
is_phase_end() {
local u="$1"
if [[ "$u" == */* ]]; then [[ "${u##*/}" == "00_phase.md" ]]; else return 0; fi
}
# Move a completed unit from todo/ to complete/ (same relative path).
move_unit() {
local u="$1" p t
if [[ "$u" == */* ]]; then
p="${u%%/*}"; t="${u##*/}"
mkdir -p "$PHASE_DONE/$p"
mv -f "$PHASE_TODO/$u" "$PHASE_DONE/$p/$t"
if [[ -z "$(ls -A "$PHASE_TODO/$p" 2>/dev/null)" ]]; then rmdir "$PHASE_TODO/$p"; fi
else
mkdir -p "$PHASE_DONE"
mv -f "$PHASE_TODO/$u" "$PHASE_DONE/$u"
fi
}
# --- child pi arguments -------------------------------------------------------
build_pi_args() {
PI_ARGS=()
[[ -n "${PHASE_MODEL:-}" ]] && PI_ARGS+=(--model "$PHASE_MODEL")
[[ -n "${PHASE_THINKING:-}" ]] && PI_ARGS+=(--thinking "$PHASE_THINKING")
if [[ "${PI_TRUST:-0}" == "1" ]]; then
PI_ARGS+=(--approve) # load project .pi/ settings, skills, extensions
else
PI_ARGS+=(--no-approve) # deterministic: global config + AGENTS.md only
fi
}
# Most recently modified child session file (or empty).
latest_child_session() {
ls -t "$PHASE_SESSIONS"/*.jsonl 2>/dev/null | head -n1 || true
}
# Write the last assistant text message of a session file to a report file.
# Recovery path: when the child's JSON stream loses its tail (e.g. the child
# is signaled mid-flush), the session file still holds the final report.
# Returns 1 when there is no recoverable assistant text.
recover_report() {
local report="$1" session="$2"
[[ -f "$session" ]] || return 1
node -e '
const [report, file] = process.argv.slice(1);
const { readFileSync, writeFileSync } = require("node:fs");
let last = "";
for (const line of readFileSync(file, "utf8").split("\n")) {
const t = line.trim();
if (!t) continue;
let e;
try { e = JSON.parse(t); } catch { continue; }
const m = e && e.type === "message" ? e.message : null;
if (!m || m.role !== "assistant") continue;
let text = "";
if (typeof m.content === "string") text = m.content;
else if (Array.isArray(m.content))
text = m.content.filter((b) => b && b.type === "text").map((b) => b.text).join("");
if (text.trim()) last = text.trim();
}
if (!last) process.exit(1);
writeFileSync(report, last + "\n");
' "$report" "$session"
}
# --- prompts ------------------------------------------------------------------
# First-attempt prompt for a unit. Directory tasks render the task executor
# prompt; the phase overview renders the phase-final prompt; legacy flat
# phase files render the original phase executor prompt.
first_prompt() {
local unit="$1" p t
if [[ "$unit" == */* ]]; then
p="${unit%%/*}"; t="${unit##*/}"
if [[ "$t" == "00_phase.md" ]]; then
[[ -f "$PHASE_FINAL_PROMPT_FILE" ]] || die "missing $PHASE_FINAL_PROMPT_FILE"
sed "s|{{PHASE}}|$p|g" "$PHASE_FINAL_PROMPT_FILE"
else
[[ -f "$TASK_EXECUTOR_PROMPT_FILE" ]] || die "missing $TASK_EXECUTOR_PROMPT_FILE"
sed "s|{{PHASE}}|$p|g; s|{{TASK}}|$t|g" "$TASK_EXECUTOR_PROMPT_FILE"
fi
else
[[ -f "$EXECUTOR_PROMPT_FILE" ]] || die "missing $EXECUTOR_PROMPT_FILE"
sed "s|{{PHASE}}|$unit|g" "$EXECUTOR_PROMPT_FILE"
fi
}
fix_prompt() {
local errors="$1"
{
echo "Your previous attempt at this task was rejected by the harness."
echo "The failures from the last attempt are below. Review them, fix the code, and re-run the full test suite and linter until everything is green. Do not start other tasks' work."
echo
echo "Failure output (may be truncated):"
echo '```'
printf '%s\n' "$errors" | tail -c 6000
echo '```'
echo
echo "When everything is green, reply with the same report as before (at most 15 lines: what was fixed, test/lint/coverage results, notable decisions, next pending task)."
}
}
# --- child executor -----------------------------------------------------------
# run_child <unit> <attempt> <prompt> [resume-session]
# Attempt 1: fresh session in .agent/phase-sessions/.
# Attempt N>1: resumes the given session file — the failed executor's own
# session, tracked by execute_unit (so retries keep its work). When no
# session was captured (or FRESH_FIX=1) a fresh ephemeral session runs with
# the failure context instead.
# Progress (tool calls, assistant text, thinking, compaction) streams to the
# terminal live via scripts/progress.mjs, which also writes the final
# assistant message to: unit_report <unit> <attempt> md
# Child stderr → unit_report <unit> <attempt> err
# QUIET=1 suppresses the progress display (report file is still written).
# Sets CHILD_RC (pi's exit code) and PROGRESS_RC (progress.mjs's exit code;
# non-zero means the stream ended without a clean final report).
# Run `pi … | progress.mjs`, capturing both exit codes. Must be the direct
# caller of the pipeline, and PIPESTATUS must be copied in ONE statement —
# any following command (even a plain assignment) resets it.
_run_pi_pipeline() {
local errf="$1"; shift
"$@" 2>"$errf" | "${PROGRESS[@]}"
local rcs=( "${PIPESTATUS[@]}" )
CHILD_RC=${rcs[0]}
PROGRESS_RC=${rcs[1]}
# Ctrl+C sends INT to the whole foreground group: pi and progress.mjs die
# with 130, and bash then SUPPRESSES the script's INT trap (it assumes the
# job already handled the signal). Detect the kill here and exit as if the
# trap had fired, so the failure is always visible.
if (( CHILD_RC == 130 || PROGRESS_RC == 130 )); then
echo
echo "✗ ERROR: interrupted (SIGINT) — unit is left in $PHASE_TODO/; re-run to continue" >&2
exit 130
fi
if (( CHILD_RC == 143 || PROGRESS_RC == 143 )); then
echo
echo "✗ ERROR: interrupted (SIGTERM) — unit is left in $PHASE_TODO/; re-run to continue" >&2
exit 143
fi
}
run_child() {
local unit="$1" attempt="$2" prompt="$3" resume_session="${4:-}"
local base out errf
base="$(unit_base "$unit")"
out="$(unit_report "$unit" "$attempt" md)"
errf="$(unit_report "$unit" "$attempt" err)"
mkdir -p "$(dirname "$out")"
local PROGRESS=(node "$SKILL_DIR/scripts/progress.mjs" "$out")
[[ "${QUIET:-0}" == "1" ]] && PROGRESS+=(--quiet)
if (( attempt == 1 )); then
_run_pi_pipeline "$errf" pi "${PI_ARGS[@]}" --session-dir "$PHASE_SESSIONS" --name "$base" --mode json "$prompt"
elif [[ "${FRESH_FIX:-0}" == "1" || -z "$resume_session" || ! -f "$resume_session" ]]; then
echo " (no resumable session — starting fresh)"
_run_pi_pipeline "$errf" pi "${PI_ARGS[@]}" --no-session --mode json "$prompt"
else
echo " (resuming failed executor session: ${resume_session##*/})"
_run_pi_pipeline "$errf" pi "${PI_ARGS[@]}" --session "$resume_session" --mode json "$prompt"
fi
}
# --- validation gate ----------------------------------------------------------
ensure_validate() {
if [[ ! -f .agent/validate.sh ]]; then
cp "$SKILL_DIR/assets/validate.sh" .agent/validate.sh
chmod +x .agent/validate.sh
warn "no .agent/validate.sh found — created it from the skill template."
warn "adapt it to this project's real test/lint/coverage commands; it is the pass/fail gate after every task."
fi
}
# run_validation <logfile>; returns 0 iff .agent/validate.sh exits 0.
run_validation() {
bash .agent/validate.sh >"$1" 2>&1
}
# --- one unit (task, phase final pass, or legacy phase), with retries ---------
# execute_unit <unit>
# Returns 0 and moves the unit to complete/ on success; returns 1 after
# MAX_FIX_ATTEMPTS failed attempts (unit file is left in todo/).
execute_unit() {
local unit="$1"
local base attempt=1 errors=""
local last_session="" pre post
base="$(unit_base "$unit")"
command -v node >/dev/null 2>&1 || die "node not found on PATH (needed to render task progress)"
mkdir -p "$PHASE_DONE" "$PHASE_REPORTS" "$PHASE_SESSIONS" "$(unit_report_dir "$unit")"
ensure_validate
while (( attempt <= MAX_FIX_ATTEMPTS )); do
echo "━━ $unit — attempt $attempt/$MAX_FIX_ATTEMPTS ━━"
pre="$(latest_child_session)"
if (( attempt == 1 )); then
run_child "$unit" 1 "$(first_prompt "$unit")"
else
run_child "$unit" "$attempt" "$(fix_prompt "$errors")" "$last_session"
fi
# Track which session file this attempt used, so the next attempt resumes
# exactly this unit's failed session (not just "latest in the directory").
post="$(latest_child_session)"
if [[ -n "$post" && "$post" != "$pre" ]]; then
last_session="$post"
fi
# The child can be signaled mid-flush: the session file then holds a final
# report the stream lost. Recover it so a completed unit is not retried.
if (( CHILD_RC == 0 )) && [[ -f "$(unit_report "$unit" "$attempt" md)" ]] \
&& grep -q "no final assistant message" "$(unit_report "$unit" "$attempt" md)"; then
if [[ -n "$last_session" ]] && recover_report "$(unit_report "$unit" "$attempt" md)" "$last_session"; then
warn "stream lost the final message — report recovered from ${last_session##*/}"
PROGRESS_RC=0
fi
fi
errors=""
if (( CHILD_RC != 0 )); then
warn "child pi exited with code $CHILD_RC — see $(unit_report "$unit" "$attempt" err)"
errors+="[child pi exited with code $CHILD_RC]"$'\n'"$(tail -c 4000 "$(unit_report "$unit" "$attempt" err)" 2>/dev/null)"
fi
if (( PROGRESS_RC != 0 )); then
warn "child run ended without a clean final report — see $(unit_report "$unit" "$attempt" md)"
errors+="[child run ended without a clean final report]"$'\n'"$(tail -c 4000 "$(unit_report "$unit" "$attempt" err)" 2>/dev/null)"
fi
if ! run_validation "$(unit_report "$unit" "$attempt" validate)"; then
warn ".agent/validate.sh FAILED — see $(unit_report "$unit" "$attempt" validate)"
errors+="[.agent/validate.sh FAILED]"$'\n'"$(tail -n 120 "$(unit_report "$unit" "$attempt" validate)" 2>/dev/null)"
fi
if [[ -z "$errors" ]]; then
move_unit "$unit"
if is_phase_end "$unit"; then
echo "✓ $unit → complete (phase $(unit_phase "$unit") done)"
if [[ "${PHASE_COMMIT:-0}" == "1" ]]; then
if git add -A 2>/dev/null && git commit --no-gpg-sign -m "phase: $(unit_phase "$unit")" >/dev/null 2>&1; then
echo " (committed)"
else
warn "git commit failed (continuing)"
fi
fi
else
echo "✓ $unit → complete"
fi
echo "── executor report ──"
cat "$(unit_report "$unit" "$attempt" md)"
return 0
fi
attempt=$(( attempt + 1 ))
done
{
echo "✗ $unit FAILED after $MAX_FIX_ATTEMPTS attempts — left in $PHASE_TODO/."
echo " last errors:"
printf '%s\n' "$errors" | tail -n 40 | sed 's/^/ /'
echo " logs: $(unit_report_dir "$unit")/$(unit_base "$unit").a*.{md,err,validate}"
if [[ -n "${last_session:-}" && -f "${last_session:-}" ]]; then
echo " resume: re-run this script (it auto-resumes the failed session), or manually:"
echo " pi --session $last_session -c \"review the failures above, fix them, re-validate\""
else
echo " resume: re-run this script to retry automatically"
fi
} >&2
return 1
}