Add container-native scheduled task system with timezone support

Introduces a cron-based scheduler that lets Claude set up recurring and
one-time tasks inside containers. Tasks run as separate Claude Code agents
and persist across container recreation via the named volume.

New files:
- container/triple-c-scheduler: CLI for add/remove/enable/disable/list/logs/run/notifications
- container/triple-c-task-runner: cron wrapper with flock, logging, notifications, auto-cleanup

Key changes:
- Dockerfile: add cron package and COPY both scripts
- entrypoint.sh: timezone setup, cron daemon, crontab restore, env saving
- container.rs: init=true for zombie reaping, TZ env, scheduler instructions, timezone recreation check
- image.rs: embed scheduler scripts in build context
- app_settings.rs + types.ts: timezone field
- settings_commands.rs: detect_host_timezone via iana-time-zone crate
- SettingsPanel.tsx: timezone input with auto-detection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src-tauri/Cargo.lock

@@ -4675,6 +4675,7 @@ dependencies = [
  "dirs",
  "fern",
  "futures-util",
+ "iana-time-zone",
  "keyring",
  "log",
  "reqwest 0.12.28",

app/src-tauri/Cargo.toml

@@ -29,6 +29,7 @@ log = "0.4"
 fern = { version = "0.7", features = ["date-based"] }
 tar = "0.4"
 reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
+iana-time-zone = "0.1"
 
 [build-dependencies]
 tauri-build = { version = "2", features = [] }

app/src-tauri/src/commands/project_commands.rs

@@ -160,6 +160,7 @@ pub async fn start_project_container(
                     &project,
                     settings.global_claude_instructions.as_deref(),
                     &settings.global_custom_env_vars,
+                    settings.timezone.as_deref(),
                 )
                 .await
                 .unwrap_or(false);
@@ -175,6 +176,7 @@ pub async fn start_project_container(
                     &settings.global_aws,
                     settings.global_claude_instructions.as_deref(),
                     &settings.global_custom_env_vars,
+                    settings.timezone.as_deref(),
                 ).await?;
                 docker::start_container(&new_id).await?;
                 new_id
@@ -191,6 +193,7 @@ pub async fn start_project_container(
                 &settings.global_aws,
                 settings.global_claude_instructions.as_deref(),
                 &settings.global_custom_env_vars,
+                settings.timezone.as_deref(),
             ).await?;
             docker::start_container(&new_id).await?;
             new_id

app/src-tauri/src/commands/settings_commands.rs

@@ -29,6 +29,33 @@ pub async fn pull_image(
     .await
 }
 
+#[tauri::command]
+pub async fn detect_host_timezone() -> Result<String, String> {
+    // Try the iana-time-zone crate first (cross-platform)
+    match iana_time_zone::get_timezone() {
+        Ok(tz) => return Ok(tz),
+        Err(e) => log::debug!("iana_time_zone::get_timezone() failed: {}", e),
+    }
+
+    // Fallback: check TZ env var
+    if let Ok(tz) = std::env::var("TZ") {
+        if !tz.is_empty() {
+            return Ok(tz);
+        }
+    }
+
+    // Fallback: read /etc/timezone (Linux)
+    if let Ok(tz) = std::fs::read_to_string("/etc/timezone") {
+        let tz = tz.trim().to_string();
+        if !tz.is_empty() {
+            return Ok(tz);
+        }
+    }
+
+    // Default to UTC if detection fails
+    Ok("UTC".to_string())
+}
+
 #[tauri::command]
 pub async fn detect_aws_config() -> Result<Option<String>, String> {
     if let Some(home) = dirs::home_dir() {

app/src-tauri/src/docker/container.rs

@@ -10,6 +10,36 @@ use std::hash::{Hash, Hasher};
 use super::client::get_docker;
 use crate::models::{AuthMode, BedrockAuthMethod, ContainerInfo, EnvVar, GlobalAwsSettings, PortMapping, Project, ProjectPath};
 
+const SCHEDULER_INSTRUCTIONS: &str = r#"## Scheduled Tasks
+
+This container supports scheduled tasks via `triple-c-scheduler`. You can set up recurring or one-time tasks that run as separate Claude Code agents.
+
+### Commands
+- `triple-c-scheduler add --name "NAME" --schedule "CRON" --prompt "TASK"` — Add a recurring task
+- `triple-c-scheduler add --name "NAME" --at "YYYY-MM-DD HH:MM" --prompt "TASK"` — Add a one-time task
+- `triple-c-scheduler list` — List all scheduled tasks
+- `triple-c-scheduler remove --id ID` — Remove a task
+- `triple-c-scheduler enable --id ID` / `triple-c-scheduler disable --id ID` — Toggle tasks
+- `triple-c-scheduler logs [--id ID] [--tail N]` — View execution logs
+- `triple-c-scheduler run --id ID` — Manually trigger a task immediately
+- `triple-c-scheduler notifications [--clear]` — View or clear completion notifications
+
+### Cron format
+Standard 5-field cron: `minute hour day-of-month month day-of-week`
+Examples: `*/30 * * * *` (every 30 min), `0 9 * * 1-5` (9am weekdays), `0 */2 * * *` (every 2 hours)
+
+### One-time tasks
+Use `--at "YYYY-MM-DD HH:MM"` instead of `--schedule`. The task automatically removes itself after execution.
+
+### Working directory
+Use `--working-dir /workspace/project` to set where the task runs (default: /workspace).
+
+### Checking results
+After tasks run, check notifications with `triple-c-scheduler notifications` and detailed output with `triple-c-scheduler logs`.
+
+### Timezone
+Scheduled times use the container's configured timezone (check with `date`). If no timezone is configured, UTC is used."#;
+
 /// Compute a fingerprint string for the custom environment variables.
 /// Sorted alphabetically so order changes do not cause spurious recreation.
 fn compute_env_fingerprint(custom_env_vars: &[EnvVar]) -> String {
@@ -147,6 +177,7 @@ pub async fn create_container(
     global_aws: &GlobalAwsSettings,
     global_claude_instructions: Option<&str>,
     global_custom_env_vars: &[EnvVar],
+    timezone: Option<&str>,
 ) -> Result<String, String> {
     let docker = get_docker()?;
     let container_name = project.container_name();
@@ -269,6 +300,13 @@ pub async fn create_container(
     let custom_env_fingerprint = compute_env_fingerprint(&merged_env);
     env_vars.push(format!("TRIPLE_C_CUSTOM_ENV={}", custom_env_fingerprint));
 
+    // Container timezone
+    if let Some(tz) = timezone {
+        if !tz.is_empty() {
+            env_vars.push(format!("TZ={}", tz));
+        }
+    }
+
     // Claude instructions (global + per-project, plus port mapping info)
     let mut combined_instructions = merge_claude_instructions(
         global_claude_instructions,
@@ -290,6 +328,13 @@ pub async fn create_container(
             None => port_info,
         });
     }
+    // Scheduler instructions (always appended so all containers get scheduling docs)
+    let scheduler_docs = SCHEDULER_INSTRUCTIONS;
+    combined_instructions = Some(match combined_instructions {
+        Some(existing) => format!("{}\n\n{}", existing, scheduler_docs),
+        None => scheduler_docs.to_string(),
+    });
+
     if let Some(ref instructions) = combined_instructions {
         env_vars.push(format!("CLAUDE_INSTRUCTIONS={}", instructions));
     }
@@ -400,10 +445,12 @@ pub async fn create_container(
     labels.insert("triple-c.bedrock-fingerprint".to_string(), compute_bedrock_fingerprint(project));
     labels.insert("triple-c.ports-fingerprint".to_string(), compute_ports_fingerprint(&project.port_mappings));
     labels.insert("triple-c.image".to_string(), image_name.to_string());
+    labels.insert("triple-c.timezone".to_string(), timezone.unwrap_or("").to_string());
 
     let host_config = HostConfig {
         mounts: Some(mounts),
         port_bindings: if port_bindings.is_empty() { None } else { Some(port_bindings) },
+        init: Some(true),
         ..Default::default()
     };
 
@@ -484,6 +531,7 @@ pub async fn container_needs_recreation(
     project: &Project,
     global_claude_instructions: Option<&str>,
     global_custom_env_vars: &[EnvVar],
+    timezone: Option<&str>,
 ) -> Result<bool, String> {
     let docker = get_docker()?;
     let info = docker
@@ -571,6 +619,14 @@ pub async fn container_needs_recreation(
         }
     }
 
+    // ── Timezone ─────────────────────────────────────────────────────────
+    let expected_tz = timezone.unwrap_or("");
+    let container_tz = get_label("triple-c.timezone").unwrap_or_default();
+    if container_tz != expected_tz {
+        log::info!("Timezone mismatch (container={:?}, expected={:?})", container_tz, expected_tz);
+        return Ok(true);
+    }
+
     // ── SSH key path mount ───────────────────────────────────────────────
     let ssh_mount_source = mounts
         .and_then(|m| {

app/src-tauri/src/docker/image.rs

@@ -9,6 +9,8 @@ use crate::models::container_config;
 
 const DOCKERFILE: &str = include_str!("../../../../container/Dockerfile");
 const ENTRYPOINT: &str = include_str!("../../../../container/entrypoint.sh");
+const SCHEDULER: &str = include_str!("../../../../container/triple-c-scheduler");
+const TASK_RUNNER: &str = include_str!("../../../../container/triple-c-task-runner");
 
 pub async fn image_exists(image_name: &str) -> Result<bool, String> {
     let docker = get_docker()?;
@@ -135,6 +137,20 @@ fn create_build_context() -> Result<Vec<u8>, std::io::Error> {
         header.set_cksum();
         archive.append_data(&mut header, "entrypoint.sh", entrypoint_bytes)?;
 
+        let scheduler_bytes = SCHEDULER.as_bytes();
+        let mut header = tar::Header::new_gnu();
+        header.set_size(scheduler_bytes.len() as u64);
+        header.set_mode(0o755);
+        header.set_cksum();
+        archive.append_data(&mut header, "triple-c-scheduler", scheduler_bytes)?;
+
+        let task_runner_bytes = TASK_RUNNER.as_bytes();
+        let mut header = tar::Header::new_gnu();
+        header.set_size(task_runner_bytes.len() as u64);
+        header.set_mode(0o755);
+        header.set_cksum();
+        archive.append_data(&mut header, "triple-c-task-runner", task_runner_bytes)?;
+
         archive.finish()?;
     }
 

app/src-tauri/src/lib.rs

@@ -84,6 +84,7 @@ pub fn run() {
             commands::settings_commands::pull_image,
             commands::settings_commands::detect_aws_config,
             commands::settings_commands::list_aws_profiles,
+            commands::settings_commands::detect_host_timezone,
             // Terminal
             commands::terminal_commands::open_terminal_session,
             commands::terminal_commands::terminal_input,

app/src-tauri/src/models/app_settings.rs

@@ -68,6 +68,8 @@ pub struct AppSettings {
     pub auto_check_updates: bool,
     #[serde(default)]
     pub dismissed_update_version: Option<String>,
+    #[serde(default)]
+    pub timezone: Option<String>,
 }
 
 impl Default for AppSettings {
@@ -84,6 +86,7 @@ impl Default for AppSettings {
             global_custom_env_vars: Vec::new(),
             auto_check_updates: true,
             dismissed_update_version: None,
+            timezone: None,
         }
     }
 }

app/src/components/settings/SettingsPanel.tsx

@@ -6,6 +6,7 @@ import { useSettings } from "../../hooks/useSettings";
 import { useUpdates } from "../../hooks/useUpdates";
 import ClaudeInstructionsModal from "../projects/ClaudeInstructionsModal";
 import EnvVarsModal from "../projects/EnvVarsModal";
+import { detectHostTimezone } from "../../lib/tauri-commands";
 import type { EnvVar } from "../../lib/types";
 
 export default function SettingsPanel() {
@@ -14,6 +15,7 @@ export default function SettingsPanel() {
   const [globalInstructions, setGlobalInstructions] = useState(appSettings?.global_claude_instructions ?? "");
   const [globalEnvVars, setGlobalEnvVars] = useState<EnvVar[]>(appSettings?.global_custom_env_vars ?? []);
   const [checkingUpdates, setCheckingUpdates] = useState(false);
+  const [timezone, setTimezone] = useState(appSettings?.timezone ?? "");
   const [showInstructionsModal, setShowInstructionsModal] = useState(false);
   const [showEnvVarsModal, setShowEnvVarsModal] = useState(false);
 
@@ -21,7 +23,18 @@ export default function SettingsPanel() {
   useEffect(() => {
     setGlobalInstructions(appSettings?.global_claude_instructions ?? "");
     setGlobalEnvVars(appSettings?.global_custom_env_vars ?? []);
-  }, [appSettings?.global_claude_instructions, appSettings?.global_custom_env_vars]);
+    setTimezone(appSettings?.timezone ?? "");
+  }, [appSettings?.global_claude_instructions, appSettings?.global_custom_env_vars, appSettings?.timezone]);
+
+  // Auto-detect timezone on first load if not yet set
+  useEffect(() => {
+    if (appSettings && !appSettings.timezone) {
+      detectHostTimezone().then((tz) => {
+        setTimezone(tz);
+        saveSettings({ ...appSettings, timezone: tz });
+      }).catch(() => {});
+    }
+  }, [appSettings?.timezone]);
 
   const handleCheckNow = async () => {
     setCheckingUpdates(true);
@@ -46,6 +59,26 @@ export default function SettingsPanel() {
       <DockerSettings />
       <AwsSettings />
 
+      {/* Container Timezone */}
+      <div>
+        <label className="block text-sm font-medium mb-1">Container Timezone</label>
+        <p className="text-xs text-[var(--text-secondary)] mb-1.5">
+          Timezone for containers — affects scheduled task timing (IANA format, e.g. America/New_York)
+        </p>
+        <input
+          type="text"
+          value={timezone}
+          onChange={(e) => setTimezone(e.target.value)}
+          onBlur={async () => {
+            if (appSettings) {
+              await saveSettings({ ...appSettings, timezone: timezone || null });
+            }
+          }}
+          placeholder="UTC"
+          className="w-full px-2 py-1 text-sm bg-[var(--bg-primary)] border border-[var(--border-color)] rounded focus:outline-none focus:border-[var(--accent)]"
+        />
+      </div>
+
       {/* Global Claude Instructions */}
       <div>
         <label className="block text-sm font-medium mb-1">Claude Instructions</label>

app/src/lib/tauri-commands.ts

@@ -35,6 +35,8 @@ export const detectAwsConfig = () =>
   invoke<string | null>("detect_aws_config");
 export const listAwsProfiles = () =>
   invoke<string[]>("list_aws_profiles");
+export const detectHostTimezone = () =>
+  invoke<string>("detect_host_timezone");
 
 // Terminal
 export const openTerminalSession = (projectId: string, sessionId: string) =>

app/src/lib/types.ts

@@ -98,6 +98,7 @@ export interface AppSettings {
   global_custom_env_vars: EnvVar[];
   auto_check_updates: boolean;
   dismissed_update_version: string | null;
+  timezone: string | null;
 }
 
 export interface UpdateInfo {

container/Dockerfile

@@ -19,6 +19,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     unzip \
     pkg-config \
     libssl-dev \
+    cron \
     && rm -rf /var/lib/apt/lists/*
 
 # Remove default ubuntu user to free UID 1000 for host-user remapping
@@ -101,5 +102,9 @@ WORKDIR /workspace
 USER root
 COPY entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh
+COPY triple-c-scheduler /usr/local/bin/triple-c-scheduler
+RUN chmod +x /usr/local/bin/triple-c-scheduler
+COPY triple-c-task-runner /usr/local/bin/triple-c-task-runner
+RUN chmod +x /usr/local/bin/triple-c-task-runner
 
 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

container/entrypoint.sh

@@ -113,6 +113,59 @@ if [ -S /var/run/docker.sock ]; then
     usermod -aG "$DOCKER_GROUP" claude
 fi
 
+# ── Timezone setup ───────────────────────────────────────────────────────────
+if [ -n "${TZ:-}" ]; then
+    if [ -f "/usr/share/zoneinfo/$TZ" ]; then
+        ln -sf "/usr/share/zoneinfo/$TZ" /etc/localtime
+        echo "$TZ" > /etc/timezone
+        echo "entrypoint: timezone set to $TZ"
+    else
+        echo "entrypoint: warning — timezone '$TZ' not found in /usr/share/zoneinfo"
+    fi
+fi
+
+# ── Scheduler setup ─────────────────────────────────────────────────────────
+SCHEDULER_DIR="/home/claude/.claude/scheduler"
+mkdir -p "$SCHEDULER_DIR/tasks" "$SCHEDULER_DIR/logs" "$SCHEDULER_DIR/notifications"
+chown -R claude:claude "$SCHEDULER_DIR"
+
+# Start cron daemon (runs as root, executes jobs per user crontab)
+cron
+
+# Save environment variables for cron jobs (cron runs with a minimal env)
+ENV_FILE="$SCHEDULER_DIR/.env"
+: > "$ENV_FILE"
+env | while IFS='=' read -r key value; do
+    case "$key" in
+        ANTHROPIC_*|AWS_*|CLAUDE_CODE_*|PATH|HOME|LANG|TZ|COLORTERM)
+            # Escape single quotes in value and write as KEY='VALUE'
+            escaped_value=$(printf '%s' "$value" | sed "s/'/'\\\\''/g")
+            printf "%s='%s'\n" "$key" "$escaped_value" >> "$ENV_FILE"
+            ;;
+    esac
+done
+chown claude:claude "$ENV_FILE"
+chmod 600 "$ENV_FILE"
+
+# Restore crontab from persisted task JSON files (survives container recreation)
+if ls "$SCHEDULER_DIR/tasks/"*.json >/dev/null 2>&1; then
+    CRON_TMP=$(mktemp)
+    echo "# Triple-C scheduled tasks — managed by triple-c-scheduler" > "$CRON_TMP"
+    echo "# Do not edit manually; changes will be overwritten." >> "$CRON_TMP"
+    echo "" >> "$CRON_TMP"
+    for task_file in "$SCHEDULER_DIR/tasks/"*.json; do
+        [ -f "$task_file" ] || continue
+        enabled=$(jq -r '.enabled' "$task_file")
+        [ "$enabled" = "true" ] || continue
+        schedule=$(jq -r '.schedule' "$task_file")
+        id=$(jq -r '.id' "$task_file")
+        echo "$schedule /usr/local/bin/triple-c-task-runner $id" >> "$CRON_TMP"
+    done
+    crontab -u claude "$CRON_TMP" 2>/dev/null || true
+    rm -f "$CRON_TMP"
+    echo "entrypoint: restored crontab from persisted tasks"
+fi
+
 # ── Stay alive as claude ─────────────────────────────────────────────────────
 echo "Triple-C container ready."
 exec su -s /bin/bash claude -c "exec sleep infinity"

container/triple-c-scheduler

@@ -0,0 +1,436 @@
+#!/bin/bash
+# triple-c-scheduler — CLI for managing scheduled tasks in Triple-C containers
+# Tasks are stored as JSON files and crontab is rebuilt from them as the source of truth.
+
+set -euo pipefail
+
+SCHEDULER_DIR="${HOME}/.claude/scheduler"
+TASKS_DIR="${SCHEDULER_DIR}/tasks"
+LOGS_DIR="${SCHEDULER_DIR}/logs"
+NOTIFICATIONS_DIR="${SCHEDULER_DIR}/notifications"
+
+# ── Helpers ──────────────────────────────────────────────────────────────────
+
+ensure_dirs() {
+    mkdir -p "$TASKS_DIR" "$LOGS_DIR" "$NOTIFICATIONS_DIR"
+}
+
+generate_id() {
+    head -c 4 /dev/urandom | od -An -tx1 | tr -d ' \n'
+}
+
+rebuild_crontab() {
+    local tmp
+    tmp=$(mktemp)
+    # Header
+    echo "# Triple-C scheduled tasks — managed by triple-c-scheduler" > "$tmp"
+    echo "# Do not edit manually; changes will be overwritten." >> "$tmp"
+    echo "" >> "$tmp"
+
+    for task_file in "$TASKS_DIR"/*.json; do
+        [ -f "$task_file" ] || continue
+        local enabled schedule id
+        enabled=$(jq -r '.enabled' "$task_file")
+        [ "$enabled" = "true" ] || continue
+        schedule=$(jq -r '.schedule' "$task_file")
+        id=$(jq -r '.id' "$task_file")
+        echo "$schedule /usr/local/bin/triple-c-task-runner $id" >> "$tmp"
+    done
+
+    crontab "$tmp" 2>/dev/null || true
+    rm -f "$tmp"
+}
+
+usage() {
+    cat <<'EOF'
+Usage: triple-c-scheduler <command> [options]
+
+Commands:
+  add          Add a new scheduled task
+  remove       Remove a task
+  enable       Enable a disabled task
+  disable      Disable a task
+  list         List all tasks
+  logs         Show execution logs
+  run          Manually trigger a task now
+  notifications  Show or clear completion notifications
+
+Add options:
+  --name NAME          Task name (required)
+  --prompt "TASK"      Task prompt for Claude (required)
+  --schedule "CRON"    Cron schedule expression (for recurring tasks)
+  --at "DATETIME"      Target datetime as "YYYY-MM-DD HH:MM" (for one-time tasks)
+  --working-dir DIR    Working directory (default: /workspace)
+
+Remove/Enable/Disable/Run options:
+  --id ID              Task ID (required)
+
+Logs options:
+  --id ID              Show logs for a specific task (optional)
+  --tail N             Show last N lines (default: 50)
+
+Notifications options:
+  --clear              Clear all notifications
+
+Examples:
+  triple-c-scheduler add --name "run-tests" --schedule "*/30 * * * *" --prompt "Run the test suite and report results"
+  triple-c-scheduler add --name "friday-commit" --at "2026-03-06 16:00" --prompt "Commit all changes with a descriptive message"
+  triple-c-scheduler list
+  triple-c-scheduler logs --id a1b2c3d4 --tail 20
+  triple-c-scheduler run --id a1b2c3d4
+EOF
+}
+
+# ── Commands ─────────────────────────────────────────────────────────────────
+
+cmd_add() {
+    local name="" prompt="" schedule="" at="" working_dir="/workspace"
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --name)     name="$2"; shift 2 ;;
+            --prompt)   prompt="$2"; shift 2 ;;
+            --schedule) schedule="$2"; shift 2 ;;
+            --at)       at="$2"; shift 2 ;;
+            --working-dir) working_dir="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -z "$name" ]; then
+        echo "Error: --name is required" >&2
+        return 1
+    fi
+    if [ -z "$prompt" ]; then
+        echo "Error: --prompt is required" >&2
+        return 1
+    fi
+    if [ -z "$schedule" ] && [ -z "$at" ]; then
+        echo "Error: either --schedule or --at is required" >&2
+        return 1
+    fi
+    if [ -n "$schedule" ] && [ -n "$at" ]; then
+        echo "Error: use either --schedule or --at, not both" >&2
+        return 1
+    fi
+
+    local id task_type cron_expr
+    id=$(generate_id)
+
+    if [ -n "$at" ]; then
+        task_type="once"
+        # Parse "YYYY-MM-DD HH:MM" into cron expression
+        local year month day hour minute
+        if ! [[ "$at" =~ ^([0-9]{4})-([0-9]{2})-([0-9]{2})\ ([0-9]{2}):([0-9]{2})$ ]]; then
+            echo "Error: --at must be in format 'YYYY-MM-DD HH:MM'" >&2
+            return 1
+        fi
+        year="${BASH_REMATCH[1]}"
+        month="${BASH_REMATCH[2]}"
+        day="${BASH_REMATCH[3]}"
+        hour="${BASH_REMATCH[4]}"
+        minute="${BASH_REMATCH[5]}"
+        # Remove leading zeros for cron
+        month=$((10#$month))
+        day=$((10#$day))
+        hour=$((10#$hour))
+        minute=$((10#$minute))
+        cron_expr="$minute $hour $day $month *"
+    else
+        task_type="recurring"
+        cron_expr="$schedule"
+    fi
+
+    local created_at
+    created_at=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+    local task_json
+    task_json=$(jq -n \
+        --arg id "$id" \
+        --arg name "$name" \
+        --arg prompt "$prompt" \
+        --arg schedule "$cron_expr" \
+        --arg type "$task_type" \
+        --arg at "$at" \
+        --arg created_at "$created_at" \
+        --argjson enabled true \
+        --arg working_dir "$working_dir" \
+        '{
+            id: $id,
+            name: $name,
+            prompt: $prompt,
+            schedule: $schedule,
+            type: $type,
+            at: $at,
+            created_at: $created_at,
+            enabled: $enabled,
+            working_dir: $working_dir
+        }')
+
+    echo "$task_json" > "$TASKS_DIR/${id}.json"
+    rebuild_crontab
+
+    echo "Task created:"
+    echo "  ID:       $id"
+    echo "  Name:     $name"
+    echo "  Type:     $task_type"
+    if [ "$task_type" = "once" ]; then
+        echo "  At:       $at"
+    fi
+    echo "  Schedule: $cron_expr"
+    echo "  Prompt:   $prompt"
+}
+
+cmd_remove() {
+    local id=""
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --id) id="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -z "$id" ]; then
+        echo "Error: --id is required" >&2
+        return 1
+    fi
+
+    local task_file="$TASKS_DIR/${id}.json"
+    if [ ! -f "$task_file" ]; then
+        echo "Error: task '$id' not found" >&2
+        return 1
+    fi
+
+    local name
+    name=$(jq -r '.name' "$task_file")
+    rm -f "$task_file"
+    rebuild_crontab
+    echo "Removed task '$name' ($id)"
+}
+
+cmd_enable() {
+    local id=""
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --id) id="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -z "$id" ]; then
+        echo "Error: --id is required" >&2
+        return 1
+    fi
+
+    local task_file="$TASKS_DIR/${id}.json"
+    if [ ! -f "$task_file" ]; then
+        echo "Error: task '$id' not found" >&2
+        return 1
+    fi
+
+    local tmp
+    tmp=$(mktemp)
+    jq '.enabled = true' "$task_file" > "$tmp" && mv "$tmp" "$task_file"
+    rebuild_crontab
+
+    local name
+    name=$(jq -r '.name' "$task_file")
+    echo "Enabled task '$name' ($id)"
+}
+
+cmd_disable() {
+    local id=""
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --id) id="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -z "$id" ]; then
+        echo "Error: --id is required" >&2
+        return 1
+    fi
+
+    local task_file="$TASKS_DIR/${id}.json"
+    if [ ! -f "$task_file" ]; then
+        echo "Error: task '$id' not found" >&2
+        return 1
+    fi
+
+    local tmp
+    tmp=$(mktemp)
+    jq '.enabled = false' "$task_file" > "$tmp" && mv "$tmp" "$task_file"
+    rebuild_crontab
+
+    local name
+    name=$(jq -r '.name' "$task_file")
+    echo "Disabled task '$name' ($id)"
+}
+
+cmd_list() {
+    local found=false
+    printf "%-10s %-20s %-10s %-9s %-20s %s\n" "ID" "NAME" "TYPE" "ENABLED" "SCHEDULE" "PROMPT"
+    printf "%-10s %-20s %-10s %-9s %-20s %s\n" "──────────" "────────────────────" "──────────" "─────────" "────────────────────" "──────────────────────────────"
+
+    for task_file in "$TASKS_DIR"/*.json; do
+        [ -f "$task_file" ] || continue
+        found=true
+        local id name type enabled schedule at prompt
+        id=$(jq -r '.id' "$task_file")
+        name=$(jq -r '.name' "$task_file")
+        type=$(jq -r '.type' "$task_file")
+        enabled=$(jq -r '.enabled' "$task_file")
+        schedule=$(jq -r '.schedule' "$task_file")
+        at=$(jq -r '.at // ""' "$task_file")
+        prompt=$(jq -r '.prompt' "$task_file")
+
+        local display_schedule="$schedule"
+        if [ "$type" = "once" ] && [ -n "$at" ]; then
+            display_schedule="at $at"
+        fi
+
+        # Truncate long fields for display
+        [ ${#name} -gt 20 ] && name="${name:0:17}..."
+        [ ${#display_schedule} -gt 20 ] && display_schedule="${display_schedule:0:17}..."
+        [ ${#prompt} -gt 30 ] && prompt="${prompt:0:27}..."
+
+        printf "%-10s %-20s %-10s %-9s %-20s %s\n" "$id" "$name" "$type" "$enabled" "$display_schedule" "$prompt"
+    done
+
+    if [ "$found" = "false" ]; then
+        echo "No scheduled tasks."
+    fi
+}
+
+cmd_logs() {
+    local id="" tail_n=50
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --id)   id="$2"; shift 2 ;;
+            --tail) tail_n="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -n "$id" ]; then
+        local log_dir="$LOGS_DIR/$id"
+        if [ ! -d "$log_dir" ]; then
+            echo "No logs found for task '$id'"
+            return 0
+        fi
+        # Show the most recent log file
+        local latest
+        latest=$(ls -t "$log_dir"/*.log 2>/dev/null | head -1)
+        if [ -z "$latest" ]; then
+            echo "No logs found for task '$id'"
+            return 0
+        fi
+        echo "=== Latest log for task $id: $(basename "$latest") ==="
+        tail -n "$tail_n" "$latest"
+    else
+        # Show recent logs across all tasks
+        local all_logs
+        all_logs=$(find "$LOGS_DIR" -name "*.log" -type f 2>/dev/null | sort -r | head -n 10)
+        if [ -z "$all_logs" ]; then
+            echo "No logs found."
+            return 0
+        fi
+        for log_file in $all_logs; do
+            local task_id
+            task_id=$(basename "$(dirname "$log_file")")
+            echo "=== Task $task_id: $(basename "$log_file") ==="
+            tail -n 5 "$log_file"
+            echo ""
+        done
+    fi
+}
+
+cmd_run() {
+    local id=""
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --id) id="$2"; shift 2 ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ -z "$id" ]; then
+        echo "Error: --id is required" >&2
+        return 1
+    fi
+
+    local task_file="$TASKS_DIR/${id}.json"
+    if [ ! -f "$task_file" ]; then
+        echo "Error: task '$id' not found" >&2
+        return 1
+    fi
+
+    local name
+    name=$(jq -r '.name' "$task_file")
+    echo "Manually triggering task '$name' ($id)..."
+    /usr/local/bin/triple-c-task-runner "$id"
+}
+
+cmd_notifications() {
+    local clear=false
+
+    while [[ $# -gt 0 ]]; do
+        case "$1" in
+            --clear) clear=true; shift ;;
+            *) echo "Unknown option: $1" >&2; return 1 ;;
+        esac
+    done
+
+    if [ "$clear" = "true" ]; then
+        rm -f "$NOTIFICATIONS_DIR"/*.notify
+        echo "Notifications cleared."
+        return 0
+    fi
+
+    local found=false
+    for notify_file in $(ls -t "$NOTIFICATIONS_DIR"/*.notify 2>/dev/null); do
+        [ -f "$notify_file" ] || continue
+        found=true
+        cat "$notify_file"
+        echo "---"
+    done
+
+    if [ "$found" = "false" ]; then
+        echo "No notifications."
+    fi
+}
+
+# ── Main ─────────────────────────────────────────────────────────────────────
+
+ensure_dirs
+
+if [ $# -eq 0 ]; then
+    usage
+    exit 1
+fi
+
+command="$1"
+shift
+
+case "$command" in
+    add)           cmd_add "$@" ;;
+    remove)        cmd_remove "$@" ;;
+    enable)        cmd_enable "$@" ;;
+    disable)       cmd_disable "$@" ;;
+    list)          cmd_list ;;
+    logs)          cmd_logs "$@" ;;
+    run)           cmd_run "$@" ;;
+    notifications) cmd_notifications "$@" ;;
+    help|--help|-h) usage ;;
+    *)
+        echo "Unknown command: $command" >&2
+        usage
+        exit 1
+        ;;
+esac

container/triple-c-task-runner

@@ -0,0 +1,142 @@
+#!/bin/bash
+# triple-c-task-runner — Executes a scheduled task via Claude Code agent
+# Called by cron with a task ID argument. Handles locking, logging,
+# notifications, one-time task cleanup, and log pruning.
+
+set -uo pipefail
+
+SCHEDULER_DIR="${HOME}/.claude/scheduler"
+TASKS_DIR="${SCHEDULER_DIR}/tasks"
+LOGS_DIR="${SCHEDULER_DIR}/logs"
+NOTIFICATIONS_DIR="${SCHEDULER_DIR}/notifications"
+ENV_FILE="${SCHEDULER_DIR}/.env"
+
+TASK_ID="${1:-}"
+
+if [ -z "$TASK_ID" ]; then
+    echo "Usage: triple-c-task-runner <task-id>" >&2
+    exit 1
+fi
+
+TASK_FILE="${TASKS_DIR}/${TASK_ID}.json"
+LOCK_FILE="${SCHEDULER_DIR}/.lock-${TASK_ID}"
+
+if [ ! -f "$TASK_FILE" ]; then
+    echo "Task file not found: $TASK_FILE" >&2
+    exit 1
+fi
+
+# ── Acquire lock (prevent overlapping runs of the same task) ─────────────────
+exec 200>"$LOCK_FILE"
+if ! flock -n 200; then
+    echo "Task $TASK_ID is already running, skipping." >&2
+    exit 0
+fi
+
+# ── Source saved environment ─────────────────────────────────────────────────
+if [ -f "$ENV_FILE" ]; then
+    set -a
+    # shellcheck disable=SC1090
+    source "$ENV_FILE"
+    set +a
+fi
+
+# ── Read task definition ────────────────────────────────────────────────────
+PROMPT=$(jq -r '.prompt' "$TASK_FILE")
+WORKING_DIR=$(jq -r '.working_dir // "/workspace"' "$TASK_FILE")
+TASK_NAME=$(jq -r '.name' "$TASK_FILE")
+TASK_TYPE=$(jq -r '.type' "$TASK_FILE")
+
+# ── Prepare log directory ───────────────────────────────────────────────────
+TASK_LOG_DIR="${LOGS_DIR}/${TASK_ID}"
+mkdir -p "$TASK_LOG_DIR"
+
+TIMESTAMP=$(date +"%Y%m%d-%H%M%S")
+LOG_FILE="${TASK_LOG_DIR}/${TIMESTAMP}.log"
+
+# ── Execute Claude agent ────────────────────────────────────────────────────
+{
+    echo "=== Task: $TASK_NAME ($TASK_ID) ==="
+    echo "=== Started: $(date) ==="
+    echo "=== Working dir: $WORKING_DIR ==="
+    echo "=== Prompt: $PROMPT ==="
+    echo ""
+} > "$LOG_FILE"
+
+EXIT_CODE=0
+if [ -d "$WORKING_DIR" ]; then
+    cd "$WORKING_DIR"
+    claude -p "$PROMPT" --dangerously-skip-permissions >> "$LOG_FILE" 2>&1 || EXIT_CODE=$?
+else
+    echo "Error: working directory '$WORKING_DIR' does not exist" >> "$LOG_FILE"
+    EXIT_CODE=1
+fi
+
+{
+    echo ""
+    echo "=== Finished: $(date) ==="
+    echo "=== Exit code: $EXIT_CODE ==="
+} >> "$LOG_FILE"
+
+# ── Write notification ──────────────────────────────────────────────────────
+mkdir -p "$NOTIFICATIONS_DIR"
+NOTIFY_FILE="${NOTIFICATIONS_DIR}/${TASK_ID}_${TIMESTAMP}.notify"
+
+if [ $EXIT_CODE -eq 0 ]; then
+    STATUS="SUCCESS"
+else
+    STATUS="FAILED (exit code $EXIT_CODE)"
+fi
+
+# Extract a summary (last 10 meaningful lines before the footer)
+SUMMARY=$(grep -v "^===" "$LOG_FILE" | grep -v "^$" | tail -n 10)
+
+cat > "$NOTIFY_FILE" <<NOTIFY
+Task:    $TASK_NAME ($TASK_ID)
+Status:  $STATUS
+Time:    $(date)
+Type:    $TASK_TYPE
+
+Summary:
+$SUMMARY
+NOTIFY
+
+# ── One-time task cleanup ───────────────────────────────────────────────────
+if [ "$TASK_TYPE" = "once" ]; then
+    rm -f "$TASK_FILE"
+    # Rebuild crontab to remove the completed one-time task
+    /usr/local/bin/triple-c-scheduler list > /dev/null 2>&1 || true
+    # Direct crontab rebuild (in case scheduler list doesn't trigger it)
+    TMP_CRON=$(mktemp)
+    echo "# Triple-C scheduled tasks — managed by triple-c-scheduler" > "$TMP_CRON"
+    echo "# Do not edit manually; changes will be overwritten." >> "$TMP_CRON"
+    echo "" >> "$TMP_CRON"
+    for tf in "$TASKS_DIR"/*.json; do
+        [ -f "$tf" ] || continue
+        local_enabled=$(jq -r '.enabled' "$tf")
+        [ "$local_enabled" = "true" ] || continue
+        local_schedule=$(jq -r '.schedule' "$tf")
+        local_id=$(jq -r '.id' "$tf")
+        echo "$local_schedule /usr/local/bin/triple-c-task-runner $local_id" >> "$TMP_CRON"
+    done
+    crontab "$TMP_CRON" 2>/dev/null || true
+    rm -f "$TMP_CRON"
+fi
+
+# ── Prune old logs (keep 20 per task) ───────────────────────────────────────
+LOG_COUNT=$(find "$TASK_LOG_DIR" -name "*.log" -type f 2>/dev/null | wc -l)
+if [ "$LOG_COUNT" -gt 20 ]; then
+    find "$TASK_LOG_DIR" -name "*.log" -type f | sort | head -n $((LOG_COUNT - 20)) | xargs rm -f
+fi
+
+# ── Prune old notifications (keep 50 total) ─────────────────────────────────
+NOTIFY_COUNT=$(find "$NOTIFICATIONS_DIR" -name "*.notify" -type f 2>/dev/null | wc -l)
+if [ "$NOTIFY_COUNT" -gt 50 ]; then
+    find "$NOTIFICATIONS_DIR" -name "*.notify" -type f | sort | head -n $((NOTIFY_COUNT - 50)) | xargs rm -f
+fi
+
+# Release lock
+flock -u 200
+rm -f "$LOCK_FILE"
+
+exit $EXIT_CODE