export function rootHelp(): unknown {
  return {
    entry: "bun scripts/cli.ts",
    output: "json",
    commands: [
      { command: "help", description: "List supported commands." },
      { command: "--main-server-ip <ip> <command>", description: "Run selected commands through the public frontend API; use --main-server-key only for legacy SSH transport." },
      { command: "config show", description: "Validate and print config.json as the single source of truth." },
      { command: "check [--full|--files|--scripts-typecheck|--components|--compose|--logs|--rust]", description: "Run the lightweight default syntax/config gate; Rust is opt-in and only allowed from D601 CI/dev execution." },
      { command: "server start", description: "Fire-and-forget build/start for database, backend-core, frontend, provider gateway, and managed main-server user services." },
      { command: "server stop", description: "Fire-and-forget docker-compose down for the fixed UniDesk stack." },
      { command: "server status", description: "Show fixed ports, containers, service health, and public URLs." },
      { command: "server swap status|ensure [--path /swapfile] [--size 2GiB] [--dry-run]", description: "Inspect or idempotently create host swap for low-memory main-server operation." },
      { command: "server logs [--tail-bytes N]", description: "Return bounded tails from file logs and docker logs." },
      { command: "server rebuild <backend-core|frontend|dev-frontend-proxy|provider-gateway|todo-note|code-queue-mgr|project-manager|baidu-netdisk|oa-event-flow>", description: "Build first, then serialize, force-recreate, and validate one Compose service." },
      { command: "provider attach <providerId> [--master-server URL] [--up] [--force]", description: "Generate the minimal external provider-gateway env/compose bundle; only master server URL and provider id are required." },
      { command: "ssh <providerId> [ssh-like args...]", description: "Open a Host SSH / WSL SSH maintenance session through the provider-gateway bridge with built-in remote helper tools in PATH." },
      { command: "ssh <providerId> apply-patch [tool args...] < patch.diff", description: "Invoke the injected remote apply_patch helper directly over SSH passthrough and stream the patch from local stdin." },
      { command: "ssh <providerId> py [script-args...] < script.py", description: "Run remote Python from local stdin through SSH passthrough without nested shell quoting; extra args become script argv." },
      { command: "ssh <providerId> skills [--scope all|wsl|windows] [--limit N]", description: "Discover WSL/Linux and, for WSL providers, Windows skill directories in one SSH passthrough call." },
      { command: "ssh <providerId> find <path...> [--max-depth N] [--type d|f|l] [--contains TEXT] [--iname PATTERN] [--limit N] [--sort]", description: "Run a structured remote find command without nested shell quoting or parentheses." },
      { command: "ssh <providerId> glob [--root DIR] [--pattern PATTERN] [--contains TEXT] [--type any|f|d] [--limit N] [--sort]", description: "Run remote glob matching through the injected helper without shell glob expansion." },
      { command: "ssh <providerId> argv <command> [args...]", description: "Run a remote command with each argv token shell-quoted by UniDesk before SSH passthrough." },
      { command: "microservice list", description: "List UniDesk-managed user services and their provider/runtime mapping." },
      { command: "microservice status <id>", description: "Show one user service config, repository reference, backend mapping, and runtime status." },
      { command: "microservice health <id>", description: "Probe one user service through backend-core -> provider-gateway HTTP proxy." },
      { command: "microservice proxy <id> <path> [--method GET|POST|PUT|PATCH|DELETE] [--body-json JSON|--body-file path|--body-stdin] [--raw] [--max-body-bytes N]", description: "Access a private user-service backend path through the same frontend-only proxy used by WebUI; JSON request bodies are supported for controlled write/debug endpoints." },
      { command: "microservice diagnostics <id>", description: "Split k3sctl-managed proxy health into provider-gateway, HTTP tunnel, adapter, Kubernetes API service proxy, and target Service checks." },
      { command: "microservice tunnel-self-test <id>", description: "Trigger an expected provider HTTP tunnel failure and verify requestId/stage diagnostics are returned." },
      { command: "decision upload <markdown-file> [--title text] [--type meeting|decision] [--level G0|G1|G2|G3|P0|P1|P2|P3|none] [--status active|blocked|parked|done] [--linked-goal-id id] [--evidence url]", description: "Upload a meeting note or decision record through backend-core -> decision-center user-service proxy." },
      { command: "decision diary import <markdown-file> [--source-file path] [--tag tag] [--include-entries]", description: "Import a dated work log Markdown into PostgreSQL diary entries split as YYYY-MM/YYYY-MM-DD.md." },
      { command: "decision diary list [--month YYYY-MM] [--from YYYY-MM-DD] [--to YYYY-MM-DD] [--limit N] [--include-body]", description: "List daily Markdown diary entries stored by Decision Center." },
      { command: "decision diary months", description: "List available Decision Center diary months with day counts." },
      { command: "decision diary show <YYYY-MM-DD|id>", description: "Show one daily diary Markdown entry." },
      { command: "decision list [--type ...] [--status ...] [--level ...] [--linked-goal-id id] [--limit N]", description: "List Decision Center records through the user-service proxy." },
      { command: "decision show <id>", description: "Show one Decision Center record." },
      { command: "deploy check|plan|apply [--file deploy.json|--env dev|prod] [--service id] [--dry-run] [--force]", description: "Reconcile services from a repo+commit manifest; --env reads origin/master:deploy.json environments and can apply supported dev services." },
      { command: "dev-env validate|prewarm-images", description: "Validate D601 unidesk-dev guardrails or prewarm dev foundation images into native k3s containerd through a bounded async job." },
      { command: "artifact-registry plan|render|status|health|install --dry-run", description: "Plan and inspect the D601 host-managed CNCF Distribution registry for future backend-core artifact CD; first-stage install is dry-run only." },
      { command: "schedule list|get|runs|run|delete", description: "Manage backend-core scheduled tasks and run history; schedule run <id> supports --wait-ms N." },
      { command: "schedule upsert-pgdata-backup [--time HH:MM] [--remote-base /SERVER_DATA/UNIDESK_PG_DATA]", description: "Create or update the daily PGDATA physical backup task that uploads monthly rotated archives to Baidu Netdisk." },
      { command: "codex deploy <commitId> [--provider-id D601] [--timeout-ms N]", description: "Compatibility wrapper for deploy apply --service code-queue with a temporary repo+commit manifest." },
      { command: "codex submit [prompt] [--prompt-file path|--prompt-stdin] [--queue queueId] [--provider-id id] [--cwd path] [--model model] [--execution-mode mode] [--max-attempts N] [--reference-task-id id] [--dry-run]", description: "Submit a Code Queue task through backend-core -> code-queue proxy; --dry-run shows the structured request without enqueueing." },
      { command: "codex task <taskId> [--trace --tail|--from-start|--after-seq N|--before-seq N --limit N] [--full]", description: "Fetch a compact Code Queue task summary; trace rows are opt-in and paged with next/previous commands to avoid output explosion." },
      { command: "codex output <taskId> [--tail|--from-start|--after-seq N|--before-seq N --limit N] [--full-text]", description: "Fetch paged raw Code Queue output records by seq when a trace row has omitted command/output text." },
      { command: "codex judge <taskId> --attempt N [--dry-run] [--include-prompt]", description: "Replay one stored Code Queue attempt through the same judge context builder and MiniMax judge call path used by the live queue worker." },
      { command: "codex interrupt|cancel <taskId>", description: "Request interrupt for a running Code Queue task, or cancel a queued/retry_wait task, through the same private proxy." },
      { command: "codex (queues | queue create <queueId> | queue merge <sourceQueueId> --into <targetQueueId> | move <taskId> --queue <queueId>)", description: "List/create/merge Code Queue lanes and move a queued task; merge preserves task queue time order and deletes the source queue record." },
      { command: "job list [--limit N] [--include-command]", description: "List async jobs from .state/jobs with a bounded default page." },
      { command: "job status <jobId|latest> [--tail-bytes N]", description: "Show job state with bounded stdout/stderr tails." },
      { command: "debug health", description: "Probe internal core, nodes, system/Docker status, frontend, provider ingress, and public boundary." },
      { command: "debug dispatch [providerId] [docker.ps|provider.upgrade|host.ssh|microservice.http|echo] [--wait-ms N]", description: "Submit a real internal-core dispatch request for CLI debugging." },
      { command: "debug task <taskId|latest>", description: "Read a dispatched task record from internal core for CLI debugging." },
      { command: "network perf [--service code-queue --path /api/tasks/overview?limit=30 --count N --concurrency N --label before|after]", description: "Benchmark frontend -> backend-core -> provider/adapter user-service networking and report latency/proxy-mode distributions." },
      { command: "ci install|status|run|run-dev-e2e|logs", description: "Manage D601 k3s Tekton CI only; run-dev-e2e manually validates master deploy.json dev state in an isolated temporary namespace." },
      { command: "e2e run [--only pattern[,pattern...]] [--skip pattern[,pattern...]]", description: "Run selected public/internal/Playwright E2E checks; use --only for focused iteration and rerun without filters for final regression." },
    ],
  };
}

export function isHelpToken(value: string | undefined): boolean {
  return value === "help" || value === "--help" || value === "-h";
}

export function serverHelp(action: string | undefined = undefined): unknown {
  return {
    command: action === undefined || isHelpToken(action) ? "server start|stop|status|swap|logs|rebuild" : `server ${action}`,
    output: "json",
    description: "Manage the fixed main-server Docker Compose stack without exposing backend-core REST publicly.",
    usage: {
      start: "bun scripts/cli.ts server start",
      stop: "bun scripts/cli.ts server stop",
      status: "bun scripts/cli.ts server status",
      swap: "bun scripts/cli.ts server swap status|ensure [--path /swapfile] [--size 2GiB] [--dry-run]",
      logs: "bun scripts/cli.ts server logs [--tail-bytes N]",
      rebuild: "bun scripts/cli.ts server rebuild <backend-core|frontend|dev-frontend-proxy|provider-gateway|todo-note|code-queue-mgr|project-manager|baidu-netdisk|oa-event-flow>",
    },
    publicEntrypoints: {
      frontend: "prod UniDesk frontend",
      devFrontend: "dev UniDesk frontend proxy to D601 unidesk-dev/frontend-dev",
      providerIngress: "provider-gateway WebSocket ingress",
    },
    rustBoundary: {
      masterServer: "do not use server rebuild backend-core for Rust iteration; it would build locally",
      d601: "use deploy apply --env dev --service backend-core and CI for Rust build/check",
    },
  };
}

export function sshHelp(): unknown {
  return {
    command: "ssh",
    output: "json",
    description: "Open a Host SSH / WSL SSH maintenance session through the provider-gateway bridge.",
    usage: [
      "bun scripts/cli.ts ssh <providerId>",
      "bun scripts/cli.ts ssh <providerId> argv <command> [args...]",
      "bun scripts/cli.ts ssh <providerId> apply-patch < patch.diff",
      "bun scripts/cli.ts ssh <providerId> py [script-args...] < script.py",
      "bun scripts/cli.ts ssh <providerId> skills [--scope all|wsl|windows] [--limit N]",
      "bun scripts/cli.ts ssh <providerId> find <path...> [--contains TEXT] [--limit N]",
      "bun scripts/cli.ts ssh <providerId> glob [--root DIR] [--pattern PATTERN]",
    ],
    notes: [
      "ssh --help and ssh <providerId> --help print this JSON help and never open an interactive session.",
      "Use argv when nested shell quoting would be fragile.",
      "Use -- before a remote command that intentionally starts with a dash.",
    ],
  };
}

function configHelp(): unknown {
  return {
    command: "config show",
    output: "json",
    usage: "bun scripts/cli.ts config show",
    description: "Validate and print the root config.json single source of truth.",
  };
}

function microserviceHelp(): unknown {
  return {
    command: "microservice list|status|health|diagnostics|tunnel-self-test|proxy",
    output: "json",
    usage: [
      "bun scripts/cli.ts microservice list",
      "bun scripts/cli.ts microservice status <id>",
      "bun scripts/cli.ts microservice health <id>",
      "bun scripts/cli.ts microservice diagnostics <id>",
      "bun scripts/cli.ts microservice tunnel-self-test <id>",
      "bun scripts/cli.ts microservice proxy <id> <path> [--method GET|POST|PUT|PATCH|DELETE] [--body-json JSON|--body-file path|--body-stdin] [--raw] [--full] [--max-body-bytes N]",
    ],
    description: "Access UniDesk-managed user services through the same backend-core/provider proxy path used by the WebUI.",
  };
}

function decisionHelp(): unknown {
  return {
    command: "decision upload|list|show|health|diary",
    output: "json",
    usage: [
      "bun scripts/cli.ts decision upload <markdown-file> [--title text] [--type meeting|decision]",
      "bun scripts/cli.ts decision list [--type ...] [--status ...] [--level ...] [--limit N]",
      "bun scripts/cli.ts decision show <id>",
      "bun scripts/cli.ts decision health",
      "bun scripts/cli.ts decision diary import|list|months|show ...",
    ],
    description: "Operate Decision Center through the registered user-service proxy.",
  };
}

function providerHelp(): unknown {
  return {
    command: "provider attach",
    output: "json",
    usage: "bun scripts/cli.ts provider attach <providerId> [--master-server URL] [--up] [--force]",
    description: "Generate the minimal provider-gateway attach env/compose bundle for a new compute node.",
  };
}

function scheduleHelp(): unknown {
  return {
    command: "schedule list|get|runs|run|delete|upsert-pgdata-backup",
    output: "json",
    usage: [
      "bun scripts/cli.ts schedule list",
      "bun scripts/cli.ts schedule get <id>",
      "bun scripts/cli.ts schedule runs [id] [--limit N]",
      "bun scripts/cli.ts schedule run <id> [--wait-ms N]",
      "bun scripts/cli.ts schedule delete <id>",
      "bun scripts/cli.ts schedule upsert-pgdata-backup [--time HH:MM] [--remote-base path]",
    ],
    description: "Manage backend-core scheduled tasks and run history through the private core API.",
  };
}

function codexHelp(): unknown {
  return {
    command: "codex deploy|submit|task|output|judge|interrupt|cancel|queues|queue|move",
    output: "json",
    usage: [
      "bun scripts/cli.ts codex submit [prompt] [--prompt-file path|--prompt-stdin] [--queue id] [--dry-run]",
      "bun scripts/cli.ts codex task <taskId> [--trace --tail|--from-start|--after-seq N|--before-seq N --limit N] [--full]",
      "bun scripts/cli.ts codex output <taskId> [--tail|--from-start|--after-seq N|--before-seq N --limit N] [--full-text]",
      "bun scripts/cli.ts codex judge <taskId> --attempt N [--dry-run] [--include-prompt]",
      "bun scripts/cli.ts codex interrupt|cancel <taskId>",
      "bun scripts/cli.ts codex queues | queue create <queueId> | queue merge <sourceQueueId> --into <targetQueueId> | move <taskId> --queue <queueId>",
    ],
    description: "Operate Code Queue through the stable backend-core private proxy path.",
  };
}

function jobHelp(): unknown {
  return {
    command: "job list|status",
    output: "json",
    usage: [
      "bun scripts/cli.ts job list [--limit N] [--include-command]",
      "bun scripts/cli.ts job status <jobId|latest> [--tail-bytes N]",
    ],
    description: "Inspect fire-and-forget job state from .state/jobs without streaming unbounded logs.",
  };
}

function debugHelp(): unknown {
  return {
    command: "debug health|dispatch|task",
    output: "json",
    usage: [
      "bun scripts/cli.ts debug health",
      "bun scripts/cli.ts debug dispatch [providerId] [docker.ps|provider.upgrade|host.ssh|microservice.http|echo] [--wait-ms N]",
      "bun scripts/cli.ts debug task <taskId|latest>",
    ],
    description: "Debug the real core/provider/dispatch paths; do not use these as formal TEST.md acceptance steps.",
  };
}

function networkHelp(): unknown {
  return {
    command: "network perf",
    output: "json",
    usage: "bun scripts/cli.ts network perf [--service id --path /api/path --count N --concurrency N --label text]",
    description: "Benchmark frontend/backend/provider user-service networking with bounded JSON latency summaries.",
  };
}

function e2eHelp(): unknown {
  return {
    command: "e2e run",
    output: "json",
    usage: "bun scripts/cli.ts e2e run [--only pattern[,pattern...]] [--skip pattern[,pattern...]]",
    description: "Run selected public/internal/Playwright E2E checks; use filters for focused iteration and full run for final regression.",
  };
}

function devEnvHelp(): unknown {
  return {
    command: "dev-env validate|prewarm-images",
    output: "json",
    usage: [
      "bun scripts/cli.ts dev-env validate [--manifest path] [--kubectl-dry-run]",
      "bun scripts/cli.ts dev-env prewarm-images [--image image] [--provider-id D601] [--no-pull] [--dry-run]",
    ],
    description: "Validate D601 unidesk-dev guardrails or prewarm foundation images into native k3s containerd.",
  };
}

function artifactRegistryHelp(): unknown {
  return {
    command: "artifact-registry plan|render|status|health|install",
    output: "json",
    usage: [
      "bun scripts/cli.ts artifact-registry plan [--provider-id D601]",
      "bun scripts/cli.ts artifact-registry render [--provider-id D601]",
      "bun scripts/cli.ts artifact-registry status [--provider-id D601]",
      "bun scripts/cli.ts artifact-registry health [--provider-id D601]",
      "bun scripts/cli.ts artifact-registry install --dry-run [--provider-id D601]",
    ],
    description: "Manage the declaration, rendered files and readonly checks for the D601 host-managed CNCF Distribution artifact registry.",
    boundary: [
      "registry endpoint is D601 loopback 127.0.0.1:5000 only",
      "service is host-managed by systemd + Docker Compose, not k3s-managed",
      "first-stage install without --dry-run is rejected",
      "status and health use provider-gateway Host SSH readonly checks",
    ],
  };
}

export function staticNamespaceHelp(args: string[]): unknown | null {
  const [top] = args;
  if (!args.slice(1).some(isHelpToken)) return null;
  if (top === "config") return configHelp();
  if (top === "microservice") return microserviceHelp();
  if (top === "decision" || top === "decision-center") return decisionHelp();
  if (top === "provider") return providerHelp();
  if (top === "schedule") return scheduleHelp();
  if (top === "codex") return codexHelp();
  if (top === "job") return jobHelp();
  if (top === "debug") return debugHelp();
  if (top === "network") return networkHelp();
  if (top === "e2e") return e2eHelp();
  if (top === "dev-env") return devEnvHelp();
  if (top === "artifact-registry") return artifactRegistryHelp();
  return null;
}