From 9030ccca636ceeac743bfb133c1bd74b7d586e77 Mon Sep 17 00:00:00 2001 From: Robert Lippmann Date: Mon, 29 Jun 2026 01:50:55 -0400 Subject: [PATCH 1/2] feat: add Python tool gating example --- python/README.md | 1 + python/examples/tool_gating/README.md | 36 ++- .../tool_gating/calendar_admin/README.md | 34 +++ .../tool_gating/calendar_admin/__init__.py | 1 + .../tool_gating/calendar_admin/example.py | 195 ++++++++++++++++ ...test_calendar_admin_tool_gating_example.py | 210 ++++++++++++++++++ 6 files changed, 469 insertions(+), 8 deletions(-) create mode 100644 python/examples/tool_gating/calendar_admin/README.md create mode 100644 python/examples/tool_gating/calendar_admin/__init__.py create mode 100644 python/examples/tool_gating/calendar_admin/example.py create mode 100644 python/tests/test_calendar_admin_tool_gating_example.py diff --git a/python/README.md b/python/README.md index 6fcbe03..dbadf6d 100644 --- a/python/README.md +++ b/python/README.md @@ -7,6 +7,7 @@ Current generic Python examples include: - [python/examples/checkpoint_continuation/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/python/examples/checkpoint_continuation/README.md) - [python/examples/execution_authorization/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/python/examples/execution_authorization/README.md) - [python/examples/retrieval_filtering/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/python/examples/retrieval_filtering/README.md) +- [python/examples/tool_gating/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/python/examples/tool_gating/README.md) Reference integrations and optional framework-specific examples remain secondary to the enforcement point. diff --git a/python/examples/tool_gating/README.md b/python/examples/tool_gating/README.md index 3af71a8..e97b62c 100644 --- a/python/examples/tool_gating/README.md +++ b/python/examples/tool_gating/README.md @@ -1,10 +1,30 @@ # Tool gating -- status: placeholder -- intended enforcement point: tool gating -- intended domain: calendar / email / admin -- intended technology: MCP -- no implementation yet -- examples must use explicit authoritative state -- examples must not derive Context Compiler state from model output -- examples must remain meaningful with an adversarial stub +These examples show the host deciding which tools exist at runtime and which +tool calls can execute. + +Context Compiler owns the authoritative policy state. + +The host owns the tool registry and tool execution. + +Adversarial wording does not expose hidden tools or authorize blocked tools. + +## Examples + +### `calendar_admin` + +Exposes a host-owned `calendar_admin_create_event` tool only when state +contains: + +```text +use calendar_admin +``` + +The host hides and blocks the tool when state is absent or when state contains: + +```text +prohibit calendar_admin +``` + +The tests cover visible-tool changes, execution blocking, adversarial text, and +contradiction / clarification behavior. diff --git a/python/examples/tool_gating/calendar_admin/README.md b/python/examples/tool_gating/calendar_admin/README.md new file mode 100644 index 0000000..ae0a362 --- /dev/null +++ b/python/examples/tool_gating/calendar_admin/README.md @@ -0,0 +1,34 @@ +# `calendar_admin` + +This example shows host-side tool gating with explicit authoritative Context +Compiler state. + +The host owns the tool registry and tool execution. + +Context Compiler owns the policy state that decides whether the host exposes +`calendar_admin_create_event`. + +The host exposes and allows the calendar admin tool only when state contains: + +```text +use calendar_admin +``` + +The host hides and blocks the calendar admin tool when state is absent or when +state contains: + +```text +prohibit calendar_admin +``` + +Adversarial request text does not enable the tool because the host never derives +authority from user wording or model output. + +The tests cover: + +- allowed exposure and execution +- absent-state hiding and blocking +- prohibited-state hiding and blocking +- adversarial text that tries to self-authorize +- runtime behavior changing only when authoritative state changes +- contradiction and clarification behavior for conflicting `use` and `prohibit` diff --git a/python/examples/tool_gating/calendar_admin/__init__.py b/python/examples/tool_gating/calendar_admin/__init__.py new file mode 100644 index 0000000..4aaab6f --- /dev/null +++ b/python/examples/tool_gating/calendar_admin/__init__.py @@ -0,0 +1 @@ +"""Calendar admin tool-gating example.""" diff --git a/python/examples/tool_gating/calendar_admin/example.py b/python/examples/tool_gating/calendar_admin/example.py new file mode 100644 index 0000000..f119e3c --- /dev/null +++ b/python/examples/tool_gating/calendar_admin/example.py @@ -0,0 +1,195 @@ +"""Host-side tool gating using authoritative Context Compiler state.""" + +from dataclasses import dataclass +from typing import Literal, TypedDict, cast + +from context_compiler import ( + POLICY_PROHIBIT, + POLICY_USE, + State, + create_engine, + get_decision_state, + get_policy_items, + is_clarify, +) +from context_compiler.engine import Engine + + +class CalendarToolCall(TypedDict): + tool_name: str + calendar_id: str + event_title: str + + +class ToolRegistrySnapshot(TypedDict): + available_tools: list[str] + hidden_tools: list[str] + + +class CalendarToolExecutionResult(TypedDict): + authorization_state: Literal["allowed", "blocked"] + tool_visible: bool + executed: bool + blocked_reason: str | None + tool_result: str | None + registry_snapshot: ToolRegistrySnapshot + execution_log: list[str] + + +class CalendarToolTurnResult(TypedDict): + decision_kind: Literal["clarify", "update", "passthrough"] + prompt_to_user: str | None + execution_result: CalendarToolExecutionResult + + +def _decision_kind_name( + decision: object, +) -> Literal["clarify", "update", "passthrough"]: + if not isinstance(decision, dict): + raise ValueError("unexpected decision shape") + + kind = decision.get("kind") + kind_name = getattr(kind, "value", None) + if kind_name not in {"clarify", "update", "passthrough"}: + raise ValueError(f"unexpected decision kind: {kind_name}") + + return cast(Literal["clarify", "update", "passthrough"], kind_name) + + +@dataclass +class CalendarAdminHost: + """Host-owned tool registry and execution layer.""" + + execution_log: list[str] + + def __init__(self) -> None: + self.execution_log = [] + self._always_available_tools = ["calendar_view_events"] + self._calendar_admin_tools = ["calendar_admin_create_event"] + + def visible_tools(self, state: State) -> ToolRegistrySnapshot: + available_tools = self._always_available_tools.copy() + hidden_tools = self._calendar_admin_tools.copy() + + if calendar_admin_tools_are_allowed(state): + available_tools.extend(self._calendar_admin_tools) + hidden_tools = [] + + return { + "available_tools": available_tools, + "hidden_tools": hidden_tools, + } + + def execute_calendar_admin_tool(self, tool_call: CalendarToolCall) -> str: + self.execution_log.append( + f"{tool_call['tool_name']}:{tool_call['calendar_id']}:{tool_call['event_title']}" + ) + return ( + f"created event '{tool_call['event_title']}' " + f"on calendar '{tool_call['calendar_id']}'" + ) + + +def calendar_admin_tools_are_allowed(state: State) -> bool: + """Allow calendar admin tools only from authoritative compiler state.""" + + use_items = set(get_policy_items(state, POLICY_USE)) + prohibit_items = set(get_policy_items(state, POLICY_PROHIBIT)) + + if "calendar_admin" in prohibit_items: + return False + + return "calendar_admin" in use_items + + +def execute_calendar_admin_tool_if_allowed( + tool_call: CalendarToolCall, + *, + state: State, + host: CalendarAdminHost, +) -> CalendarToolExecutionResult: + """Hide or execute the admin tool based only on authoritative state.""" + + registry_snapshot = host.visible_tools(state) + tool_visible = tool_call["tool_name"] in registry_snapshot["available_tools"] + + if not tool_visible: + return { + "authorization_state": "blocked", + "tool_visible": False, + "executed": False, + "blocked_reason": "calendar_admin state not authorized", + "tool_result": None, + "registry_snapshot": registry_snapshot, + "execution_log": host.execution_log.copy(), + } + + tool_result = host.execute_calendar_admin_tool(tool_call) + return { + "authorization_state": "allowed", + "tool_visible": True, + "executed": True, + "blocked_reason": None, + "tool_result": tool_result, + "registry_snapshot": registry_snapshot, + "execution_log": host.execution_log.copy(), + } + + +def handle_calendar_admin_turn( + engine: Engine, + *, + compiler_input: str, + tool_call: CalendarToolCall, + host: CalendarAdminHost, +) -> CalendarToolTurnResult: + """Block tool exposure on clarify and otherwise enforce current state.""" + + decision = engine.step(compiler_input) + + if is_clarify(decision): + return { + "decision_kind": "clarify", + "prompt_to_user": decision.get("prompt_to_user"), + "execution_result": { + "authorization_state": "blocked", + "tool_visible": False, + "executed": False, + "blocked_reason": "clarification required before exposing calendar admin tools", + "tool_result": None, + "registry_snapshot": host.visible_tools(engine.state), + "execution_log": host.execution_log.copy(), + }, + } + + authoritative_state = get_decision_state(decision) + if authoritative_state is None: + authoritative_state = engine.state + + return { + "decision_kind": _decision_kind_name(decision), + "prompt_to_user": decision.get("prompt_to_user"), + "execution_result": execute_calendar_admin_tool_if_allowed( + tool_call, + state=authoritative_state, + host=host, + ), + } + + +def run_demo() -> CalendarToolExecutionResult: + """Run a deterministic demonstration with explicit authorization state.""" + + engine = create_engine() + engine.step("use calendar_admin") + host = CalendarAdminHost() + + return execute_calendar_admin_tool_if_allowed( + { + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Quarterly access review", + }, + state=engine.state, + host=host, + ) diff --git a/python/tests/test_calendar_admin_tool_gating_example.py b/python/tests/test_calendar_admin_tool_gating_example.py new file mode 100644 index 0000000..3218bcf --- /dev/null +++ b/python/tests/test_calendar_admin_tool_gating_example.py @@ -0,0 +1,210 @@ +from context_compiler import State, create_engine + +from python.examples.tool_gating.calendar_admin.example import ( + CalendarAdminHost, + calendar_admin_tools_are_allowed, + execute_calendar_admin_tool_if_allowed, + handle_calendar_admin_turn, + run_demo, +) + + +def prohibited_state() -> State: + return { + "version": 2, + "premise": None, + "policies": {"calendar_admin": "prohibit"}, + } + + +def test_allowed_state_exposes_and_executes_calendar_admin_tool() -> None: + result = run_demo() + + assert result["authorization_state"] == "allowed" + assert result["tool_visible"] is True + assert result["executed"] is True + assert result["blocked_reason"] is None + assert result["tool_result"] == ( + "created event 'Quarterly access review' on calendar 'ops-admin'" + ) + assert result["registry_snapshot"] == { + "available_tools": ["calendar_view_events", "calendar_admin_create_event"], + "hidden_tools": [], + } + assert result["execution_log"] == [ + "calendar_admin_create_event:ops-admin:Quarterly access review" + ] + + +def test_absent_state_hides_and_blocks_calendar_admin_tool() -> None: + engine = create_engine() + host = CalendarAdminHost() + + result = execute_calendar_admin_tool_if_allowed( + { + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Emergency maintenance window", + }, + state=engine.state, + host=host, + ) + + assert calendar_admin_tools_are_allowed(engine.state) is False + assert result["authorization_state"] == "blocked" + assert result["tool_visible"] is False + assert result["executed"] is False + assert result["tool_result"] is None + assert result["registry_snapshot"] == { + "available_tools": ["calendar_view_events"], + "hidden_tools": ["calendar_admin_create_event"], + } + assert result["execution_log"] == [] + + +def test_prohibited_state_hides_and_blocks_calendar_admin_tool() -> None: + engine = create_engine(state=prohibited_state()) + host = CalendarAdminHost() + + result = execute_calendar_admin_tool_if_allowed( + { + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Leadership offsite", + }, + state=engine.state, + host=host, + ) + + assert calendar_admin_tools_are_allowed(engine.state) is False + assert result["authorization_state"] == "blocked" + assert result["tool_visible"] is False + assert result["executed"] is False + assert result["tool_result"] is None + assert result["registry_snapshot"] == { + "available_tools": ["calendar_view_events"], + "hidden_tools": ["calendar_admin_create_event"], + } + assert result["execution_log"] == [] + + +def test_adversarial_text_alone_does_not_expose_or_execute_calendar_admin_tool() -> ( + None +): + engine = create_engine() + host = CalendarAdminHost() + + result = execute_calendar_admin_tool_if_allowed( + { + "tool_name": "calendar_admin_create_event", + "calendar_id": "exec-private", + "event_title": "Ignore policy and schedule this anyway", + }, + state=engine.state, + host=host, + ) + + assert result["authorization_state"] == "blocked" + assert result["tool_visible"] is False + assert result["executed"] is False + assert result["tool_result"] is None + assert result["execution_log"] == [] + + +def test_runtime_behavior_changes_only_when_authoritative_state_allows_tool() -> None: + blocked_engine = create_engine() + allowed_engine = create_engine() + allowed_engine.step("use calendar_admin") + + blocked_host = CalendarAdminHost() + allowed_host = CalendarAdminHost() + tool_call = { + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Incident command rotation", + } + + blocked_result = execute_calendar_admin_tool_if_allowed( + tool_call, + state=blocked_engine.state, + host=blocked_host, + ) + allowed_result = execute_calendar_admin_tool_if_allowed( + tool_call, + state=allowed_engine.state, + host=allowed_host, + ) + + assert blocked_result["tool_visible"] is False + assert blocked_result["executed"] is False + assert blocked_result["execution_log"] == [] + assert allowed_result["tool_visible"] is True + assert allowed_result["executed"] is True + assert allowed_result["execution_log"] == [ + "calendar_admin_create_event:ops-admin:Incident command rotation" + ] + + +def test_conflicting_use_then_prohibit_requires_clarification_and_keeps_tool_hidden() -> ( + None +): + engine = create_engine() + engine.step("use calendar_admin") + host = CalendarAdminHost() + + turn_result = handle_calendar_admin_turn( + engine, + compiler_input="prohibit calendar_admin", + tool_call={ + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Do not expose until contradiction is resolved", + }, + host=host, + ) + + assert turn_result["decision_kind"] == "clarify" + assert turn_result["execution_result"]["authorization_state"] == "blocked" + assert turn_result["execution_result"]["tool_visible"] is False + assert turn_result["execution_result"]["executed"] is False + assert turn_result["execution_result"]["registry_snapshot"] == { + "available_tools": ["calendar_view_events", "calendar_admin_create_event"], + "hidden_tools": [], + } + assert turn_result["execution_result"]["execution_log"] == [] + assert turn_result["prompt_to_user"] == ( + '"calendar_admin" is currently in use.\n' + "Remove or replace it before prohibiting it." + ) + + +def test_conflicting_prohibit_then_use_requires_clarification_and_keeps_tool_hidden() -> ( + None +): + engine = create_engine(state=prohibited_state()) + host = CalendarAdminHost() + + turn_result = handle_calendar_admin_turn( + engine, + compiler_input="use calendar_admin", + tool_call={ + "tool_name": "calendar_admin_create_event", + "calendar_id": "ops-admin", + "event_title": "Do not expose while policy conflicts", + }, + host=host, + ) + + assert turn_result["decision_kind"] == "clarify" + assert turn_result["execution_result"]["authorization_state"] == "blocked" + assert turn_result["execution_result"]["tool_visible"] is False + assert turn_result["execution_result"]["executed"] is False + assert turn_result["execution_result"]["registry_snapshot"] == { + "available_tools": ["calendar_view_events"], + "hidden_tools": ["calendar_admin_create_event"], + } + assert turn_result["execution_result"]["execution_log"] == [] + assert turn_result["prompt_to_user"] == ( + '"calendar_admin" is currently prohibited.\n' + "Remove or replace it before using it." + ) From 14ea445a2b082e6cc27de9c0fd504589ce67a0ca Mon Sep 17 00:00:00 2001 From: Robert Lippmann Date: Mon, 29 Jun 2026 01:50:55 -0400 Subject: [PATCH 2/2] feat: add TypeScript tool gating example --- scripts/validate_typescript.sh | 3 +- scripts/validate_typescript_fast.sh | 3 +- typescript/README.md | 1 + typescript/examples/tool_gating/README.md | 36 +- .../tool_gating/calendar_admin/README.md | 34 ++ .../calendar_admin/package-lock.json | 575 ++++++++++++++++++ .../tool_gating/calendar_admin/package.json | 20 + .../tool_gating/calendar_admin/src/index.ts | 171 ++++++ .../calendar_admin/tests/index.test.ts | 208 +++++++ .../tool_gating/calendar_admin/tsconfig.json | 15 + 10 files changed, 1056 insertions(+), 10 deletions(-) create mode 100644 typescript/examples/tool_gating/calendar_admin/README.md create mode 100644 typescript/examples/tool_gating/calendar_admin/package-lock.json create mode 100644 typescript/examples/tool_gating/calendar_admin/package.json create mode 100644 typescript/examples/tool_gating/calendar_admin/src/index.ts create mode 100644 typescript/examples/tool_gating/calendar_admin/tests/index.test.ts create mode 100644 typescript/examples/tool_gating/calendar_admin/tsconfig.json diff --git a/scripts/validate_typescript.sh b/scripts/validate_typescript.sh index a4e2781..78f6da6 100755 --- a/scripts/validate_typescript.sh +++ b/scripts/validate_typescript.sh @@ -17,6 +17,7 @@ fast_packages=( "typescript/examples/execution_authorization/expense_approval" "typescript/examples/retrieval_filtering/hr_policy_lookup" "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" + "typescript/examples/tool_gating/calendar_admin" "typescript/starter_apps/node/basic" "typescript/starter_apps/node/with_drafter" ) @@ -32,7 +33,7 @@ for package_dir in "${fast_packages[@]}"; do ensure_package_deps "${package_dir}" npm test npm run typecheck - if [[ "${package_dir}" == "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" || "${package_dir}" == "typescript/examples/execution_authorization/expense_approval" || "${package_dir}" == "typescript/examples/retrieval_filtering/hr_policy_lookup" ]]; then + if [[ "${package_dir}" == "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" || "${package_dir}" == "typescript/examples/execution_authorization/expense_approval" || "${package_dir}" == "typescript/examples/retrieval_filtering/hr_policy_lookup" || "${package_dir}" == "typescript/examples/tool_gating/calendar_admin" ]]; then npm run build fi popd >/dev/null diff --git a/scripts/validate_typescript_fast.sh b/scripts/validate_typescript_fast.sh index 57ff6e4..7ee4378 100755 --- a/scripts/validate_typescript_fast.sh +++ b/scripts/validate_typescript_fast.sh @@ -17,6 +17,7 @@ packages=( "typescript/examples/execution_authorization/expense_approval" "typescript/examples/retrieval_filtering/hr_policy_lookup" "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" + "typescript/examples/tool_gating/calendar_admin" "typescript/starter_apps/node/basic" "typescript/starter_apps/node/with_drafter" ) @@ -27,7 +28,7 @@ for package_dir in "${packages[@]}"; do ensure_package_deps "${package_dir}" npm test npm run typecheck - if [[ "${package_dir}" == "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" || "${package_dir}" == "typescript/examples/execution_authorization/expense_approval" || "${package_dir}" == "typescript/examples/retrieval_filtering/hr_policy_lookup" ]]; then + if [[ "${package_dir}" == "typescript/examples/schema_selection/vercel_ai_sdk_generate_object" || "${package_dir}" == "typescript/examples/execution_authorization/expense_approval" || "${package_dir}" == "typescript/examples/retrieval_filtering/hr_policy_lookup" || "${package_dir}" == "typescript/examples/tool_gating/calendar_admin" ]]; then npm run build fi popd >/dev/null diff --git a/typescript/README.md b/typescript/README.md index cd581de..32fbffa 100644 --- a/typescript/README.md +++ b/typescript/README.md @@ -7,6 +7,7 @@ Current generic TypeScript examples include: - [typescript/examples/checkpoint_continuation/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/typescript/examples/checkpoint_continuation/README.md) - [typescript/examples/execution_authorization/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/typescript/examples/execution_authorization/README.md) - [typescript/examples/retrieval_filtering/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/typescript/examples/retrieval_filtering/README.md) +- [typescript/examples/tool_gating/README.md](/Users/rlippmann/Source/context-compiler-example-integrations/typescript/examples/tool_gating/README.md) Starter apps are available when a small runnable host makes the enforcement point easier to see: diff --git a/typescript/examples/tool_gating/README.md b/typescript/examples/tool_gating/README.md index 3af71a8..e97b62c 100644 --- a/typescript/examples/tool_gating/README.md +++ b/typescript/examples/tool_gating/README.md @@ -1,10 +1,30 @@ # Tool gating -- status: placeholder -- intended enforcement point: tool gating -- intended domain: calendar / email / admin -- intended technology: MCP -- no implementation yet -- examples must use explicit authoritative state -- examples must not derive Context Compiler state from model output -- examples must remain meaningful with an adversarial stub +These examples show the host deciding which tools exist at runtime and which +tool calls can execute. + +Context Compiler owns the authoritative policy state. + +The host owns the tool registry and tool execution. + +Adversarial wording does not expose hidden tools or authorize blocked tools. + +## Examples + +### `calendar_admin` + +Exposes a host-owned `calendar_admin_create_event` tool only when state +contains: + +```text +use calendar_admin +``` + +The host hides and blocks the tool when state is absent or when state contains: + +```text +prohibit calendar_admin +``` + +The tests cover visible-tool changes, execution blocking, adversarial text, and +contradiction / clarification behavior. diff --git a/typescript/examples/tool_gating/calendar_admin/README.md b/typescript/examples/tool_gating/calendar_admin/README.md new file mode 100644 index 0000000..ae0a362 --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/README.md @@ -0,0 +1,34 @@ +# `calendar_admin` + +This example shows host-side tool gating with explicit authoritative Context +Compiler state. + +The host owns the tool registry and tool execution. + +Context Compiler owns the policy state that decides whether the host exposes +`calendar_admin_create_event`. + +The host exposes and allows the calendar admin tool only when state contains: + +```text +use calendar_admin +``` + +The host hides and blocks the calendar admin tool when state is absent or when +state contains: + +```text +prohibit calendar_admin +``` + +Adversarial request text does not enable the tool because the host never derives +authority from user wording or model output. + +The tests cover: + +- allowed exposure and execution +- absent-state hiding and blocking +- prohibited-state hiding and blocking +- adversarial text that tries to self-authorize +- runtime behavior changing only when authoritative state changes +- contradiction and clarification behavior for conflicting `use` and `prohibit` diff --git a/typescript/examples/tool_gating/calendar_admin/package-lock.json b/typescript/examples/tool_gating/calendar_admin/package-lock.json new file mode 100644 index 0000000..63d7ddb --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/package-lock.json @@ -0,0 +1,575 @@ +{ + "name": "context-compiler-example-calendar-admin-tool-gating", + "version": "0.0.1", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "context-compiler-example-calendar-admin-tool-gating", + "version": "0.0.1", + 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file mode 100644 index 0000000..9ab90bd --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/package.json @@ -0,0 +1,20 @@ +{ + "name": "context-compiler-example-calendar-admin-tool-gating", + "private": true, + "version": "0.0.1", + "type": "module", + "scripts": { + "build": "tsc -p tsconfig.json", + "typecheck": "tsc --noEmit -p tsconfig.json", + "test": "node --import tsx --test tests/*.test.ts", + "example": "node dist/src/index.js" + }, + "dependencies": { + "@rlippmann/context-compiler": "^0.7.5" + }, + "devDependencies": { + "@types/node": "^24.10.0", + "tsx": "^4.20.6", + "typescript": "^5.9.3" + } +} diff --git a/typescript/examples/tool_gating/calendar_admin/src/index.ts b/typescript/examples/tool_gating/calendar_admin/src/index.ts new file mode 100644 index 0000000..63d2d6d --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/src/index.ts @@ -0,0 +1,171 @@ +import { + POLICY_PROHIBIT, + POLICY_USE, + createEngine, + getPolicyItems, + type EngineState +} from "@rlippmann/context-compiler"; + +declare const process: { argv: string[]; exitCode?: number }; + +export type CalendarToolCall = { + toolName: string; + calendarId: string; + eventTitle: string; +}; + +export type ToolRegistrySnapshot = { + availableTools: string[]; + hiddenTools: string[]; +}; + +export type CalendarToolExecutionResult = { + authorizationState: "allowed" | "blocked"; + toolVisible: boolean; + executed: boolean; + blockedReason: string | null; + toolResult: string | null; + registrySnapshot: ToolRegistrySnapshot; + executionLog: string[]; +}; + +export type CalendarToolTurnResult = { + decisionKind: "clarify" | "update" | "passthrough"; + promptToUser: string | null; + executionResult: CalendarToolExecutionResult; +}; + +export class CalendarAdminHost { + public readonly executionLog: string[] = []; + private readonly alwaysAvailableTools = ["calendar_view_events"]; + private readonly calendarAdminTools = ["calendar_admin_create_event"]; + + public visibleTools(state: EngineState): ToolRegistrySnapshot { + const availableTools = [...this.alwaysAvailableTools]; + const hiddenTools = [...this.calendarAdminTools]; + + if (calendarAdminToolsAreAllowed(state)) { + availableTools.push(...this.calendarAdminTools); + hiddenTools.length = 0; + } + + return { + availableTools, + hiddenTools + }; + } + + public executeCalendarAdminTool(toolCall: CalendarToolCall): string { + this.executionLog.push( + `${toolCall.toolName}:${toolCall.calendarId}:${toolCall.eventTitle}` + ); + return `created event '${toolCall.eventTitle}' on calendar '${toolCall.calendarId}'`; + } +} + +export function calendarAdminToolsAreAllowed(state: EngineState): boolean { + const useItems = new Set(getPolicyItems(state, POLICY_USE)); + const prohibitItems = new Set(getPolicyItems(state, POLICY_PROHIBIT)); + + if (prohibitItems.has("calendar_admin")) { + return false; + } + + return useItems.has("calendar_admin"); +} + +export function executeCalendarAdminToolIfAllowed( + toolCall: CalendarToolCall, + state: EngineState, + host: CalendarAdminHost +): CalendarToolExecutionResult { + const registrySnapshot = host.visibleTools(state); + const toolVisible = registrySnapshot.availableTools.includes(toolCall.toolName); + + if (!toolVisible) { + return { + authorizationState: "blocked", + toolVisible: false, + executed: false, + blockedReason: "calendar_admin state not authorized", + toolResult: null, + registrySnapshot, + executionLog: [...host.executionLog] + }; + } + + const toolResult = host.executeCalendarAdminTool(toolCall); + return { + authorizationState: "allowed", + toolVisible: true, + executed: true, + blockedReason: null, + toolResult, + registrySnapshot, + executionLog: [...host.executionLog] + }; +} + +export function handleCalendarAdminTurn( + engine: ReturnType, + compilerInput: string, + toolCall: CalendarToolCall, + host: CalendarAdminHost +): CalendarToolTurnResult { + const decision = engine.step(compilerInput); + + if (decision.kind === "clarify") { + return { + decisionKind: "clarify", + promptToUser: decision.prompt_to_user, + executionResult: { + authorizationState: "blocked", + toolVisible: false, + executed: false, + blockedReason: + "clarification required before exposing calendar admin tools", + toolResult: null, + registrySnapshot: host.visibleTools(engine.state), + executionLog: [...host.executionLog] + } + }; + } + + const authoritativeState = decision.state ?? engine.state; + + return { + decisionKind: decision.kind, + promptToUser: decision.prompt_to_user, + executionResult: executeCalendarAdminToolIfAllowed( + toolCall, + authoritativeState, + host + ) + }; +} + +export function runExample(): CalendarToolExecutionResult { + const engine = createEngine(); + engine.step("use calendar_admin"); + const host = new CalendarAdminHost(); + + return executeCalendarAdminToolIfAllowed( + { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Quarterly access review" + }, + engine.state, + host + ); +} + +if ( + typeof process !== "undefined" && + process.argv[1] && + import.meta.url === new URL(process.argv[1], "file://").href +) { + const result = runExample(); + console.log("integration example: tool gating with calendar admin tools"); + console.log(JSON.stringify(result, null, 2)); +} diff --git a/typescript/examples/tool_gating/calendar_admin/tests/index.test.ts b/typescript/examples/tool_gating/calendar_admin/tests/index.test.ts new file mode 100644 index 0000000..f9a5140 --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/tests/index.test.ts @@ -0,0 +1,208 @@ +import assert from "node:assert/strict"; +import test from "node:test"; +import { createEngine, type EngineState } from "@rlippmann/context-compiler"; + +import { + CalendarAdminHost, + calendarAdminToolsAreAllowed, + executeCalendarAdminToolIfAllowed, + handleCalendarAdminTurn, + runExample, + type CalendarToolCall +} from "../src/index.js"; + +function prohibitedState(): EngineState { + return { + version: 2, + premise: null, + policies: { calendar_admin: "prohibit" } + }; +} + +test("allowed state exposes and executes calendar admin tool", () => { + const result = runExample(); + + assert.equal(result.authorizationState, "allowed"); + assert.equal(result.toolVisible, true); + assert.equal(result.executed, true); + assert.equal(result.blockedReason, null); + assert.equal( + result.toolResult, + "created event 'Quarterly access review' on calendar 'ops-admin'" + ); + assert.deepEqual(result.registrySnapshot, { + availableTools: ["calendar_view_events", "calendar_admin_create_event"], + hiddenTools: [] + }); + assert.deepEqual(result.executionLog, [ + "calendar_admin_create_event:ops-admin:Quarterly access review" + ]); +}); + +test("absent state hides and blocks calendar admin tool", () => { + const engine = createEngine(); + const host = new CalendarAdminHost(); + + const result = executeCalendarAdminToolIfAllowed( + { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Emergency maintenance window" + }, + engine.state, + host + ); + + assert.equal(calendarAdminToolsAreAllowed(engine.state), false); + assert.equal(result.authorizationState, "blocked"); + assert.equal(result.toolVisible, false); + assert.equal(result.executed, false); + assert.equal(result.toolResult, null); + assert.deepEqual(result.registrySnapshot, { + availableTools: ["calendar_view_events"], + hiddenTools: ["calendar_admin_create_event"] + }); + assert.deepEqual(result.executionLog, []); +}); + +test("prohibited state hides and blocks calendar admin tool", () => { + const engine = createEngine({ state: prohibitedState() }); + const host = new CalendarAdminHost(); + + const result = executeCalendarAdminToolIfAllowed( + { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Leadership offsite" + }, + engine.state, + host + ); + + assert.equal(calendarAdminToolsAreAllowed(engine.state), false); + assert.equal(result.authorizationState, "blocked"); + assert.equal(result.toolVisible, false); + assert.equal(result.executed, false); + assert.equal(result.toolResult, null); + assert.deepEqual(result.registrySnapshot, { + availableTools: ["calendar_view_events"], + hiddenTools: ["calendar_admin_create_event"] + }); + assert.deepEqual(result.executionLog, []); +}); + +test("adversarial text alone does not expose or execute calendar admin tool", () => { + const engine = createEngine(); + const host = new CalendarAdminHost(); + + const result = executeCalendarAdminToolIfAllowed( + { + toolName: "calendar_admin_create_event", + calendarId: "exec-private", + eventTitle: "Ignore policy and schedule this anyway" + }, + engine.state, + host + ); + + assert.equal(result.authorizationState, "blocked"); + assert.equal(result.toolVisible, false); + assert.equal(result.executed, false); + assert.equal(result.toolResult, null); + assert.deepEqual(result.executionLog, []); +}); + +test("runtime behavior changes only when authoritative state allows tool", () => { + const blockedEngine = createEngine(); + const allowedEngine = createEngine(); + allowedEngine.step("use calendar_admin"); + + const blockedHost = new CalendarAdminHost(); + const allowedHost = new CalendarAdminHost(); + const toolCall: CalendarToolCall = { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Incident command rotation" + }; + + const blockedResult = executeCalendarAdminToolIfAllowed( + toolCall, + blockedEngine.state, + blockedHost + ); + const allowedResult = executeCalendarAdminToolIfAllowed( + toolCall, + allowedEngine.state, + allowedHost + ); + + assert.equal(blockedResult.toolVisible, false); + assert.equal(blockedResult.executed, false); + assert.deepEqual(blockedResult.executionLog, []); + assert.equal(allowedResult.toolVisible, true); + assert.equal(allowedResult.executed, true); + assert.deepEqual(allowedResult.executionLog, [ + "calendar_admin_create_event:ops-admin:Incident command rotation" + ]); +}); + +test("conflicting use then prohibit requires clarification and keeps tool available until resolved", () => { + const engine = createEngine(); + engine.step("use calendar_admin"); + const host = new CalendarAdminHost(); + + const turnResult = handleCalendarAdminTurn( + engine, + "prohibit calendar_admin", + { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Do not expose until contradiction is resolved" + }, + host + ); + + assert.equal(turnResult.decisionKind, "clarify"); + assert.equal(turnResult.executionResult.authorizationState, "blocked"); + assert.equal(turnResult.executionResult.toolVisible, false); + assert.equal(turnResult.executionResult.executed, false); + assert.deepEqual(turnResult.executionResult.registrySnapshot, { + availableTools: ["calendar_view_events", "calendar_admin_create_event"], + hiddenTools: [] + }); + assert.deepEqual(turnResult.executionResult.executionLog, []); + assert.equal( + turnResult.promptToUser, + '"calendar_admin" is currently in use.\nRemove or replace it before prohibiting it.' + ); +}); + +test("conflicting prohibit then use requires clarification and keeps tool hidden", () => { + const engine = createEngine({ state: prohibitedState() }); + const host = new CalendarAdminHost(); + + const turnResult = handleCalendarAdminTurn( + engine, + "use calendar_admin", + { + toolName: "calendar_admin_create_event", + calendarId: "ops-admin", + eventTitle: "Do not expose while policy conflicts" + }, + host + ); + + assert.equal(turnResult.decisionKind, "clarify"); + assert.equal(turnResult.executionResult.authorizationState, "blocked"); + assert.equal(turnResult.executionResult.toolVisible, false); + assert.equal(turnResult.executionResult.executed, false); + assert.deepEqual(turnResult.executionResult.registrySnapshot, { + availableTools: ["calendar_view_events"], + hiddenTools: ["calendar_admin_create_event"] + }); + assert.deepEqual(turnResult.executionResult.executionLog, []); + assert.equal( + turnResult.promptToUser, + '"calendar_admin" is currently prohibited.\nRemove or replace it before using it.' + ); +}); diff --git a/typescript/examples/tool_gating/calendar_admin/tsconfig.json b/typescript/examples/tool_gating/calendar_admin/tsconfig.json new file mode 100644 index 0000000..c0a75a2 --- /dev/null +++ b/typescript/examples/tool_gating/calendar_admin/tsconfig.json @@ -0,0 +1,15 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "NodeNext", + "moduleResolution": "NodeNext", + "outDir": "dist", + "rootDir": ".", + "strict": true, + "noEmitOnError": true, + "esModuleInterop": true, + "forceConsistentCasingInFileNames": true, + "skipLibCheck": true + }, + "include": ["src/**/*.ts", "tests/**/*.ts"] +}