diff --git a/src/kscli/cli.py b/src/kscli/cli.py
index b4590e8..029a8b8 100644
--- a/src/kscli/cli.py
+++ b/src/kscli/cli.py
@@ -6,6 +6,7 @@
     auth,
     settings,
 )
+from kscli.commands.agent_help import agent_help
 from kscli.commands.chunk_lineages import chunk_lineages
 from kscli.commands.chunks import chunks
 from kscli.commands.document_versions import document_versions
@@ -121,6 +122,7 @@ def main(ctx, format_, no_header, base_url):  # noqa: ARG001 — params required
 main.add_command(auth.logout)
 main.add_command(auth.whoami)
 main.add_command(settings.settings)
+main.add_command(agent_help)
 
 # ── Resource groups ─────────────────────────────────────────────────────────
 
diff --git a/src/kscli/commands/agent_help.py b/src/kscli/commands/agent_help.py
new file mode 100644
index 0000000..1610f89
--- /dev/null
+++ b/src/kscli/commands/agent_help.py
@@ -0,0 +1,176 @@
+"""Compact CLI reference for AI agents — auto-generated from the Click command tree."""
+
+from __future__ import annotations
+
+import importlib.metadata
+from typing import TYPE_CHECKING
+
+import click
+
+if TYPE_CHECKING:
+    from collections.abc import Iterator
+
+COMMAND_CONSTRAINTS: dict[str, list[str]] = {
+    "folders list": [
+        "--folder-id and --parent-path-part-id are mutually exclusive",
+        "--show-content requires --folder-id",
+        "--max-depth is only valid with --show-content",
+    ],
+    "folders bulk-ingest": [
+        "Exactly one of --folder-id or --path-part-id is required",
+        "--extensions must include at least one extension",
+    ],
+    "chunks create": [
+        "Provide exactly one of --version-id or --section-id",
+    ],
+}
+
+RECIPES = """\
+── RECIPES ──
+
+Ingest a file into a folder:
+  1. kscli -f json folders list                            # find target folder
+  2. kscli -f json documents ingest --file <path> --path-part-id <path_part_id>
+  3. kscli -f json workflows list                          # monitor ingestion
+
+Search for chunks:
+  1. kscli -f json chunks search --query "…"               # dense (vector) search
+  2. kscli -f json chunks search --query "…" --mode full_text  # fallback to full-text
+  3. Add filters: --folder-ids <id> --document-ids <id> --tag-ids <id>
+
+Browse folder structure:
+  1. kscli -f json folders list                            # list root folders
+  2. kscli -f json folders list --folder-id <id> --show-content  # folder contents
+
+Bulk-ingest a local directory:
+  1. kscli folders bulk-ingest <local_path> --folder-id <id> --dry-run
+  2. kscli folders bulk-ingest <local_path> --folder-id <id>
+  3. kscli -f json workflows list                          # monitor ingestion"""
+
+
+def _compact_type(param: click.Parameter) -> str:
+    """Map a Click parameter type to a compact string representation."""
+    if isinstance(param, click.Option) and param.is_flag:
+        return "flag"
+
+    ptype = param.type
+    suffix = "[]" if getattr(param, "multiple", False) else ""
+
+    if isinstance(ptype, click.Choice):
+        return "|".join(ptype.choices) + suffix
+    type_map: dict[click.ParamType, str] = {
+        click.STRING: "str",
+        click.INT: "int",
+        click.FLOAT: "float",
+        click.UUID: "UUID",
+    }
+    for click_type, label in type_map.items():
+        if ptype is click_type or isinstance(ptype, type(click_type)):
+            return label + suffix
+    if isinstance(ptype, click.Path):
+        return "path" + suffix
+    return str(ptype) + suffix
+
+
+def _is_real_default(value: object) -> bool:
+    if value is None or value is False:
+        return False
+    s = str(value)
+    return "Sentinel" not in s and s not in ("()", "")
+
+
+def _format_option(param: click.Option) -> str:
+    names = ", ".join(param.opts + param.secondary_opts)
+    typ = _compact_type(param)
+    parts = [f"  {names}  {typ}"]
+    if _is_real_default(param.default):
+        parts.append(f"={param.default}")
+    if param.required:
+        parts.append("  REQUIRED")
+    if param.help:
+        parts.append(f"  {param.help}")
+    return "".join(parts)
+
+
+def _format_argument(param: click.Argument) -> str:
+    typ = _compact_type(param)
+    return f"{param.human_readable_name}: {typ}"
+
+
+def _walk_commands(group: click.Group) -> Iterator[tuple[str, click.Command]]:
+    """Yield (group_name, command) for every subcommand, depth-first."""
+    for name in sorted(group.list_commands(click.Context(group))):
+        cmd = group.get_command(click.Context(group), name)
+        if cmd is None:
+            continue
+        if isinstance(cmd, click.Group):
+            for sub_name in sorted(cmd.list_commands(click.Context(cmd))):
+                sub_cmd = cmd.get_command(click.Context(cmd), sub_name)
+                if sub_cmd is not None:
+                    yield name, sub_cmd
+        else:
+            yield "", cmd
+
+
+def _build_output(root: click.Group) -> str:
+    lines: list[str] = []
+
+    version = importlib.metadata.version("kscli")
+    lines.append(f"kscli v{version}")
+    lines.append("")
+
+    # Global options
+    lines.append("GLOBAL OPTIONS")
+    for param in root.params:
+        if isinstance(param, click.Option) and param.name != "help":
+            lines.append(_format_option(param))
+    lines.append("")
+
+    current_group: str | None = None
+    for group_name, cmd in _walk_commands(root):
+        if cmd.name == "agent-help":
+            continue
+
+        if group_name and group_name != current_group:
+            current_group = group_name
+            lines.append(f"── {group_name} ──")
+            lines.append("")
+
+        # Command signature
+        args = " ".join(
+            f"<{_format_argument(p)}>"
+            for p in cmd.params
+            if isinstance(p, click.Argument)
+        )
+        sig = cmd.name or ""
+        if args:
+            sig = f"{sig} {args}"
+        help_text = (cmd.help or "").split("\n")[0]
+        lines.append(f"{sig} — {help_text}" if help_text else sig)
+
+        # Options
+        for param in cmd.params:
+            if isinstance(param, click.Option) and param.name != "help":
+                lines.append(_format_option(param))
+
+        # Constraints
+        cmd_path = f"{group_name} {cmd.name}" if group_name else (cmd.name or "")
+        if cmd_path in COMMAND_CONSTRAINTS:
+            lines.append("  constraints:")
+            for c in COMMAND_CONSTRAINTS[cmd_path]:
+                lines.append(f"  - {c}")
+
+        lines.append("")
+
+    lines.append(RECIPES)
+    return "\n".join(lines)
+
+
+@click.command("agent-help")
+@click.pass_context
+def agent_help(ctx: click.Context) -> None:
+    """Print a compact CLI reference for AI agents."""
+    root = ctx.parent.command if ctx.parent else ctx.command
+    if not isinstance(root, click.Group):
+        raise click.ClickException("agent-help must be registered under a Group")
+    click.echo(_build_output(root))
diff --git a/tests/test_agent_help.py b/tests/test_agent_help.py
new file mode 100644
index 0000000..670c7d1
--- /dev/null
+++ b/tests/test_agent_help.py
@@ -0,0 +1,77 @@
+"""Unit tests for the agent-help command (Click CliRunner, no backend needed)."""
+
+from click.testing import CliRunner
+
+from kscli.cli import main
+from kscli.commands.agent_help import COMMAND_CONSTRAINTS
+
+
+class TestAgentHelp:
+    def setup_method(self) -> None:
+        self.runner = CliRunner()
+        self.result = self.runner.invoke(main, ["agent-help"])
+        self.output = self.result.output
+
+    def test_exits_successfully(self) -> None:
+        assert self.result.exit_code == 0
+
+    def test_version_header(self) -> None:
+        assert self.output.startswith("kscli v")
+
+    def test_global_options(self) -> None:
+        assert "GLOBAL OPTIONS" in self.output
+        assert "--format" in self.output
+        assert "--no-header" in self.output
+        assert "--base-url" in self.output
+
+    def test_resource_groups_present(self) -> None:
+        expected_groups = [
+            "folders",
+            "documents",
+            "document-versions",
+            "sections",
+            "chunks",
+            "tags",
+            "workflows",
+            "tenants",
+            "users",
+            "permissions",
+            "invites",
+            "threads",
+            "thread-messages",
+            "chunk-lineages",
+            "path-parts",
+        ]
+        for group in expected_groups:
+            assert f"── {group} ──" in self.output, f"missing group: {group}"
+
+    def test_agent_help_excluded(self) -> None:
+        assert "agent-help" not in self.output
+
+    def test_folders_list_options(self) -> None:
+        assert "--parent-path-part-id" in self.output
+        assert "--show-content" in self.output
+        assert "--folder-id" in self.output
+
+    def test_chunks_search_options(self) -> None:
+        assert "--query" in self.output
+        assert "--search-type" in self.output
+
+    def test_constraints_folders_list(self) -> None:
+        for constraint in COMMAND_CONSTRAINTS["folders list"]:
+            assert constraint in self.output
+
+    def test_constraints_folders_bulk_ingest(self) -> None:
+        for constraint in COMMAND_CONSTRAINTS["folders bulk-ingest"]:
+            assert constraint in self.output
+
+    def test_constraints_chunks_create(self) -> None:
+        for constraint in COMMAND_CONSTRAINTS["chunks create"]:
+            assert constraint in self.output
+
+    def test_recipes_section(self) -> None:
+        assert "── RECIPES ──" in self.output
+        assert "Ingest a file into a folder" in self.output
+        assert "Search for chunks" in self.output
+        assert "Browse folder structure" in self.output
+        assert "Bulk-ingest a local directory" in self.output