| 1 | //! `core/call`: an extension tool, while it handles a `tool/call`, asking the |
| 2 | //! core to run one of the core's tools for it. |
| 3 | //! |
| 4 | //! The call goes through the same gate as a call the model makes. The turn |
| 5 | //! loop serves it (`Engine::gate_nested_call`, source `Extension`): planning |
| 6 | //! (allow and deny lists, preparation, hooks, ask-rules, Auto-Review, repo |
| 7 | //! law, the authority envelope), then the approval card when one is needed, |
| 8 | //! then execution by the same machinery code mode uses |
| 9 | //! ([`CodemodeInvoker`]). Nothing the host sends decides any of it: not an |
| 10 | //! approval, not the card's text (Rust composes it, naming the extension and |
| 11 | //! the tool it is inside), not an argv or a URL, not the ticket's contents. |
| 12 | //! |
| 13 | //! **When it exists.** An invocation ticket is minted only for an extension |
| 14 | //! tool call that runs under a nested-call gate the turn loop is serving *for |
| 15 | //! that tool* (`NestedCallGate::extension`, set by the turn loop when the model |
| 16 | //! called the tool directly). A sub-agent's call, a tool run from inside |
| 17 | //! `execute_tools` (code mode hands nested specs no gate), a command, a timer, |
| 18 | //! activation code and every test without a turn have none, so their |
| 19 | //! `core/call`s are refused ("out of turn"). The ticket lives exactly as long |
| 20 | //! as the invocation: it is revoked when the `tool/call` ends (answered, |
| 21 | //! failed, timed out or dropped), when its owner is revoked and when its host |
| 22 | //! exits, and each of those withdraws the invocation's pending core calls and |
| 23 | //! any approval card one is waiting on. |
| 24 | //! |
| 25 | //! **What is refused outright** ([`refusal`], checked before planning on the |
| 26 | //! name the host sent and again by the turn loop on the name planning resolved |
| 27 | //! it to and the final, hook-rewritten input): everything code mode refuses |
| 28 | //! before its gate (`execute_tools`, interpreters, `agent`, `workflow`, `rlm`, |
| 29 | //! `request_user_input`, interactive shells, sandbox escalation, Computer Use |
| 30 | //! consent and scripts, MCP sign-in); any extension tool (no recursion); tool |
| 31 | //! search and tool-result retrieval; the memory writer and the tools that |
| 32 | //! change what the session may do or schedule work beyond it; and every MCP |
| 33 | //! tool, Computer Use included (not in v1: CURRENT_DECISIONS 26, the founder's |
| 34 | //! recorded default). |
| 35 | //! |
| 36 | //! **What prompts** ([`origin_approval`]): an extension's call needs approval |
| 37 | //! unless the tool is in the small read-only, workspace-local table |
| 38 | //! [`EXT_AUTO_ELIGIBLE`] and planning found nothing that asks; its approval |
| 39 | //! keys are scoped to the extension plugin build |
| 40 | //! (`approval_cache::extension_origin_approval_keys`), so a grant the user gave |
| 41 | //! the model never covers an extension's call and the reverse. Shell and |
| 42 | //! network calls force a prompt: a session grant is not consulted, and |
| 43 | //! Full Access still opens their card. Auto-Review and Never refuse them |
| 44 | //! (`resolve_approval_request_disposition`); explicit denials always win. |
| 45 | //! |
| 46 | //! **Caps.** Per invocation: 50 `core/call`s in all (the ticket's uses), 4 at |
| 47 | //! once (code mode's own cap), and one approval card at a time (the turn |
| 48 | //! loop serves one request at a time). Per host: the channel's 256 in-flight |
| 49 | //! host requests. A burst of invalid tickets ends the host (`ticket`). |
| 50 | //! |
| 51 | //! **Time.** The `tool/call` deadline is measured on the invocation's pausable |
| 52 | //! clock, which stops while a `core/call` waits on the gate, so a person |
| 53 | //! taking a minute on a card does not time the tool out. An approval is never |
| 54 | //! decided for the person: when the host cancels, the owner is revoked, the |
| 55 | //! host exits or the invocation ends, the wait is withdrawn and recorded |
| 56 | //! cancelled. |
| 57 | //! |
| 58 | //! Known limits: |
| 59 | //! * The refusal list names tools; a tool added later that changes the mode, |
| 60 | //! the posture or the permissions has to be added to [`REFUSED_NAMES`] |
| 61 | //! (a test fails when a name in it stops being a tool the core registers). |
| 62 | //! * A withdrawn call retires its card through the typed `ApprovalWithdrawn` |
| 63 | //! event on terminal and runtime clients. A later answer has no live waiter. |
| 64 | //! * Results come back as text (and structured JSON when the tool's content |
| 65 | //! was JSON); images and other rich blocks are dropped, as in code mode. |
| 66 | //! * One extension tool call at a time holds the turn's tool lock, so a |
| 67 | //! tool's `core/call`s run beside it, not through the lock. |
| 68 | |
| 69 | use std::collections::HashMap; |
| 70 | use std::sync::{Arc, Mutex}; |
| 71 | use std::time::Duration; |
| 72 | |
| 73 | use codewhale_workflow_js::ToolCallResponse; |
| 74 | use serde_json::{Value, json}; |
| 75 | use tokio_util::sync::CancellationToken; |
| 76 | |
| 77 | use super::ManagerShared; |
| 78 | use super::protocol::{ |
| 79 | ContentBlockWire, CoreCallParams, OwnerRef, RpcErrorWire, ToolResultWire, error_code, |
| 80 | }; |
| 81 | use super::supervisor::HostRequestContext; |
| 82 | use super::ticket::{Grant, Presented, Ticket, TicketKind}; |
| 83 | use super::tier::HostTier; |
| 84 | use crate::core::authority::{ToolCategory, get_tool_category_for_call}; |
| 85 | use crate::tools::codemode::{ |
| 86 | CodemodeInvoker, ExtensionCaller, NestedCallGate, NestedDecision, NestedFailure, PauseClock, |
| 87 | }; |
| 88 | use crate::tools::spec::{ToolCapability, ToolContext, ToolSpec}; |
| 89 | |
| 90 | /// The protocol method an invocation ticket is good for. |
| 91 | pub(crate) const METHOD: &str = "core/call"; |
| 92 | /// `core/call`s one invocation may make in all. |
| 93 | pub(crate) const MAX_CALLS_PER_INVOCATION: u32 = 50; |
| 94 | /// A backstop only: an invocation ends (and revokes its ticket) long before |
| 95 | /// this, and its own deadline pauses while a person decides. |
| 96 | const TICKET_TTL: Duration = Duration::from_secs(24 * 60 * 60); |
| 97 | /// Receipts attached to an extension tool's result metadata. |
| 98 | pub(crate) const RECEIPTS_ATTACHED: usize = 50; |
| 99 | |
| 100 | /// Tools an extension may never reach through `core/call`, by lower-case |
| 101 | /// name, checked on the spelling the host sent and on the canonical action |
| 102 | /// alias planning resolves it to. |
| 103 | const REFUSED_NAMES: &[&str] = &[ |
| 104 | // Discovery and retrieval: schema activation and spilled output are the |
| 105 | // turn's own. |
| 106 | "tool_search", |
| 107 | "tool_search_tool_regex", |
| 108 | "tool_search_tool_bm25", |
| 109 | "retrieve_tool_result", |
| 110 | // The memory writer. |
| 111 | "remember", |
| 112 | // What the session may do, or work scheduled beyond it. |
| 113 | "request_plugin_install", |
| 114 | "create_goal", |
| 115 | "update_goal", |
| 116 | "automation", |
| 117 | "send_later", |
| 118 | "start_mcp_server", |
| 119 | "start_registry_mcp_server", |
| 120 | ]; |
| 121 | |
| 122 | /// Read-only, workspace-local tools an extension's call may run without a |
| 123 | /// prompt, when planning also finds nothing that asks for one. Every other |
| 124 | /// tool an extension asks for needs approval. A test pins that each is a |
| 125 | /// registered, read-only, auto-approved tool. |
| 126 | pub(crate) const EXT_AUTO_ELIGIBLE: &[&str] = |
| 127 | &["read", "read_file", "list_dir", "file_search", "grep_files"]; |
| 128 | |
| 129 | /// Tools that run commands or reach the network and are not in the shell and |
| 130 | /// network categories by name: an extension's call of one forces a prompt too. |
| 131 | const FORCED_PROMPT_NAMES: &[&str] = &[ |
| 132 | "web.run", |
| 133 | "git_fetch", |
| 134 | "finance", |
| 135 | "run_tests", |
| 136 | "run_verifiers", |
| 137 | "verify", |
| 138 | "harness", |
| 139 | ]; |
| 140 | |
| 141 | fn canonical(name: &str, input: &Value) -> String { |
| 142 | // Preserve the family's registered spelling until its action is resolved. |
| 143 | // Lowercasing `Git` first would hide `Git{action:"fetch"}` from policy. |
| 144 | let family = crate::tools::canonical_action::CANONICAL_ACTION_ALIASES |
| 145 | .iter() |
| 146 | .find(|(family, _, _)| family.eq_ignore_ascii_case(name)) |
| 147 | .map_or(name, |(family, _, _)| *family); |
| 148 | crate::tools::canonical_action::canonical_action_alias(family, input).to_ascii_lowercase() |
| 149 | } |
| 150 | |
| 151 | fn is_extension_tool(specs: &[Arc<dyn ToolSpec>], name: &str) -> bool { |
| 152 | specs |
| 153 | .iter() |
| 154 | .find(|spec| spec.name().eq_ignore_ascii_case(name)) |
| 155 | .is_some_and(|spec| spec.extension_caller().is_some()) |
| 156 | } |
| 157 | |
| 158 | /// Whether the core refuses an extension's call of `name` outright, and why: |
| 159 | /// code mode's own refusals plus the extension list (module docs). Pure over |
| 160 | /// the tool snapshot, so the turn loop can run it again on what planning |
| 161 | /// resolved. `ExtraRefusal`'s shape. |
| 162 | pub(crate) fn refusal(specs: &[Arc<dyn ToolSpec>], name: &str, input: &Value) -> Option<String> { |
| 163 | if let Some(note) = crate::tools::codemode::refusal_before_gate(name, input, true) { |
| 164 | return Some(note); |
| 165 | } |
| 166 | let lower = name.to_ascii_lowercase(); |
| 167 | let resolved = canonical(name, input); |
| 168 | if is_extension_tool(specs, name) || is_extension_tool(specs, &resolved) { |
| 169 | return Some(format!( |
| 170 | "`{name}` is an extension tool; an extension's core/call cannot reach another extension's tool (or its own)" |
| 171 | )); |
| 172 | } |
| 173 | if crate::mcp::McpPool::is_mcp_tool(&lower) || crate::mcp::McpPool::is_mcp_tool(&resolved) { |
| 174 | return Some(format!( |
| 175 | "`{name}` is an MCP tool (Computer Use included); extensions cannot call MCP tools through core/call" |
| 176 | )); |
| 177 | } |
| 178 | let family = |candidate: &str| { |
| 179 | REFUSED_NAMES.contains(&candidate) |
| 180 | || crate::core::engine::tool_catalog::is_tool_search_tool(candidate) |
| 181 | || candidate.starts_with("automation_") |
| 182 | }; |
| 183 | if family(&lower) || family(&resolved) { |
| 184 | return Some(format!( |
| 185 | "`{name}` is not available to an extension's core/call (tool search and retrieval, the memory writer, and tools that change what the session may do or schedule work stay the model's own)" |
| 186 | )); |
| 187 | } |
| 188 | None |
| 189 | } |
| 190 | |
| 191 | /// How an extension's call of a tool differs from the model's, after planning |
| 192 | /// has decided what the model's call would need. |
| 193 | #[derive(Debug, Clone, Copy, PartialEq, Eq)] |
| 194 | pub(crate) enum OriginApproval { |
| 195 | /// Planning's decision stands (the tool is in [`EXT_AUTO_ELIGIBLE`] and |
| 196 | /// nothing asked for approval). |
| 197 | Unchanged, |
| 198 | /// Needs approval; an extension-scoped session grant may satisfy it. |
| 199 | Prompt, |
| 200 | /// A shell or network call: needs a prompt that no grant, and no posture |
| 201 | /// that cannot open one, may satisfy. |
| 202 | ForcePrompt, |
| 203 | } |
| 204 | |
| 205 | /// The approval an extension's call of `name` needs. `planned_requires_approval` |
| 206 | /// is what planning decided without regard to origin (a read outside the |
| 207 | /// workspace, a hook's ask or repo law all say yes there, and stay yes). |
| 208 | pub(crate) fn origin_approval( |
| 209 | name: &str, |
| 210 | input: &Value, |
| 211 | planned_requires_approval: bool, |
| 212 | spec: Option<&dyn ToolSpec>, |
| 213 | ) -> OriginApproval { |
| 214 | use crate::tools::execution_envelope::{CallClass, classify_call}; |
| 215 | |
| 216 | let lower = name.to_ascii_lowercase(); |
| 217 | let resolved = canonical(name, input); |
| 218 | let forced = |candidate: &str| { |
| 219 | matches!( |
| 220 | get_tool_category_for_call(candidate, input), |
| 221 | ToolCategory::Shell | ToolCategory::Network |
| 222 | ) || FORCED_PROMPT_NAMES.contains(&candidate) |
| 223 | }; |
| 224 | // Names cover core meta-tools; the registered capability and concrete |
| 225 | // execution classification also cover tools added without a name-list row. |
| 226 | let reaches_or_executes = spec.is_some_and(|spec| { |
| 227 | spec.capabilities().contains(&ToolCapability::Network) |
| 228 | || matches!( |
| 229 | classify_call(spec.name(), input, spec), |
| 230 | CallClass::VerificationFilter |
| 231 | | CallClass::UnboundedVerification |
| 232 | | CallClass::BoundedFetch |
| 233 | | CallClass::Executes |
| 234 | | CallClass::Reaches |
| 235 | ) |
| 236 | }); |
| 237 | if forced(&lower) || forced(&resolved) || reaches_or_executes { |
| 238 | OriginApproval::ForcePrompt |
| 239 | } else if EXT_AUTO_ELIGIBLE.contains(&resolved.as_str()) && !planned_requires_approval { |
| 240 | OriginApproval::Unchanged |
| 241 | } else { |
| 242 | OriginApproval::Prompt |
| 243 | } |
| 244 | } |
| 245 | |
| 246 | /// One extension tool call's standing to ask the core for things: its ticket |
| 247 | /// and the machinery the asks run on. Lives from the `tool/call`'s start to |
| 248 | /// its end. |
| 249 | pub(crate) struct Invocation { |
| 250 | tier: HostTier, |
| 251 | host_generation: u64, |
| 252 | owner: OwnerRef, |
| 253 | scope: Option<super::protocol::EntryRef>, |
| 254 | plugins: Option<Arc<crate::plugins::PluginRegistry>>, |
| 255 | content_hash: String, |
| 256 | calls: CodemodeInvoker, |
| 257 | /// Fires when the invocation ends or is revoked: withdraws every |
| 258 | /// `core/call` still waiting or running for it. |
| 259 | cancel: CancellationToken, |
| 260 | } |
| 261 | |
| 262 | /// The tickets and invocations of one manager. |
| 263 | #[derive(Default)] |
| 264 | pub(crate) struct CoreCalls { |
| 265 | pub(super) tickets: super::ticket::TicketTable, |
| 266 | invocations: Mutex<HashMap<String, Arc<Invocation>>>, |
| 267 | } |
| 268 | |
| 269 | impl CoreCalls { |
| 270 | /// Start an invocation for the `tool/call` `call_id` of `owner`'s tool |
| 271 | /// running on `tier`'s host process `host_generation`, if `gate` is the |
| 272 | /// nested-call gate the turn loop serves for exactly this tool |
| 273 | /// (`expected`). `None` otherwise: no ticket, so no `core/call`. |
| 274 | #[cfg(test)] |
| 275 | pub(crate) fn begin( |
| 276 | self: &Arc<Self>, |
| 277 | tier: HostTier, |
| 278 | host_generation: u64, |
| 279 | owner: &OwnerRef, |
| 280 | call_id: &str, |
| 281 | expected: &ExtensionCaller, |
| 282 | context: &ToolContext, |
| 283 | gate: &NestedCallGate, |
| 284 | ) -> Option<InvocationGuard> { |
| 285 | self.begin_scoped( |
| 286 | tier, |
| 287 | host_generation, |
| 288 | owner, |
| 289 | call_id, |
| 290 | expected, |
| 291 | context, |
| 292 | gate, |
| 293 | None, |
| 294 | String::new(), |
| 295 | ) |
| 296 | } |
| 297 | #[allow(clippy::too_many_arguments)] |
| 298 | pub(crate) fn begin_scoped( |
| 299 | self: &Arc<Self>, |
| 300 | tier: HostTier, |
| 301 | host_generation: u64, |
| 302 | owner: &OwnerRef, |
| 303 | call_id: &str, |
| 304 | expected: &ExtensionCaller, |
| 305 | context: &ToolContext, |
| 306 | gate: &NestedCallGate, |
| 307 | scope: Option<super::protocol::EntryRef>, |
| 308 | content_hash: String, |
| 309 | ) -> Option<InvocationGuard> { |
| 310 | let (caller, specs) = gate.extension()?; |
| 311 | if caller != expected { |
| 312 | return None; |
| 313 | } |
| 314 | let calls = CodemodeInvoker::for_extension( |
| 315 | specs.to_vec(), |
| 316 | context.clone(), |
| 317 | gate.clone(), |
| 318 | call_id.to_string(), |
| 319 | refusal, |
| 320 | ); |
| 321 | let ticket = self.tickets.mint(Grant { |
| 322 | kind: TicketKind::Invocation, |
| 323 | tier, |
| 324 | host_generation, |
| 325 | owner: owner.clone(), |
| 326 | method: METHOD, |
| 327 | target: json!({ "call_id": call_id }), |
| 328 | ttl: TICKET_TTL, |
| 329 | uses: MAX_CALLS_PER_INVOCATION, |
| 330 | }); |
| 331 | let invocation = Arc::new(Invocation { |
| 332 | tier, |
| 333 | host_generation, |
| 334 | owner: owner.clone(), |
| 335 | scope, |
| 336 | plugins: context.plugin_registry.clone(), |
| 337 | content_hash, |
| 338 | calls, |
| 339 | cancel: CancellationToken::new(), |
| 340 | }); |
| 341 | self.invocations |
| 342 | .lock() |
| 343 | .expect("invocations lock") |
| 344 | .insert(ticket.expose().to_string(), Arc::clone(&invocation)); |
| 345 | Some(InvocationGuard { |
| 346 | core_calls: Arc::clone(self), |
| 347 | ticket, |
| 348 | invocation, |
| 349 | }) |
| 350 | } |
| 351 | |
| 352 | /// The invocation `ticket` belongs to, still live. |
| 353 | fn invocation(&self, ticket: &str) -> Option<Arc<Invocation>> { |
| 354 | self.invocations |
| 355 | .lock() |
| 356 | .expect("invocations lock") |
| 357 | .get(ticket) |
| 358 | .cloned() |
| 359 | } |
| 360 | |
| 361 | /// Revoke and withdraw whatever `keep` says to drop. |
| 362 | fn revoke_where(&self, drop_it: impl Fn(&Invocation) -> bool) { |
| 363 | let gone: Vec<Arc<Invocation>> = { |
| 364 | let mut invocations = self.invocations.lock().expect("invocations lock"); |
| 365 | let keys: Vec<String> = invocations |
| 366 | .iter() |
| 367 | .filter(|(_, invocation)| drop_it(invocation)) |
| 368 | .map(|(key, _)| key.clone()) |
| 369 | .collect(); |
| 370 | keys.iter() |
| 371 | .filter_map(|key| invocations.remove(key)) |
| 372 | .collect() |
| 373 | }; |
| 374 | for invocation in gone { |
| 375 | invocation.cancel.cancel(); |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /// `plugin_id`'s owner was revoked: every ticket it holds is revoked and |
| 380 | /// every core call it has pending is withdrawn. |
| 381 | pub(crate) fn revoke_owner(&self, plugin_id: &str) { |
| 382 | self.tickets.revoke_owner(plugin_id); |
| 383 | self.revoke_where(|invocation| invocation.owner.plugin_id == plugin_id); |
| 384 | } |
| 385 | |
| 386 | pub(crate) fn revoke_scope(&self, plugin_id: &str, scope: &super::protocol::EntryRef) { |
| 387 | self.revoke_where(|invocation| { |
| 388 | invocation.owner.plugin_id == plugin_id && invocation.scope.as_ref() == Some(scope) |
| 389 | }); |
| 390 | } |
| 391 | |
| 392 | pub(crate) fn revoke_attachment(&self, id: u64) { |
| 393 | self.revoke_where(|invocation| { |
| 394 | invocation |
| 395 | .plugins |
| 396 | .as_ref() |
| 397 | .and_then(|plugins| plugins.caller_selection()) |
| 398 | .is_some_and(|selection| selection.attachment_id == id) |
| 399 | }); |
| 400 | } |
| 401 | |
| 402 | /// One host process exited. |
| 403 | pub(crate) fn revoke_host(&self, tier: HostTier, host_generation: u64) { |
| 404 | self.tickets.revoke_host(tier, host_generation); |
| 405 | self.revoke_where(|invocation| { |
| 406 | invocation.tier == tier && invocation.host_generation == host_generation |
| 407 | }); |
| 408 | } |
| 409 | |
| 410 | /// How many tickets are live. |
| 411 | #[cfg(test)] |
| 412 | pub(crate) fn live_tickets(&self) -> usize { |
| 413 | self.tickets.live() |
| 414 | } |
| 415 | |
| 416 | fn end(&self, ticket: &Ticket) { |
| 417 | self.tickets.revoke(ticket); |
| 418 | if let Some(invocation) = self |
| 419 | .invocations |
| 420 | .lock() |
| 421 | .expect("invocations lock") |
| 422 | .remove(ticket.expose()) |
| 423 | { |
| 424 | invocation.cancel.cancel(); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /// Redeem `params` presented by `tier`'s host process `host_generation` |
| 429 | /// and run the call. An invalid presentation is a refusal, and a burst of |
| 430 | /// them a violation `cx` reports. |
| 431 | pub(crate) async fn serve( |
| 432 | &self, |
| 433 | shared: &ManagerShared, |
| 434 | tier: HostTier, |
| 435 | host_generation: u64, |
| 436 | params: CoreCallParams, |
| 437 | cx: HostRequestContext, |
| 438 | ) -> Result<Value, RpcErrorWire> { |
| 439 | let refuse = |code: i64, message: String| RpcErrorWire { |
| 440 | code, |
| 441 | message, |
| 442 | data: None, |
| 443 | }; |
| 444 | let redeemed = self.tickets.redeem(&Presented { |
| 445 | ticket: ¶ms.ticket, |
| 446 | kind: TicketKind::Invocation, |
| 447 | tier, |
| 448 | host_generation, |
| 449 | owner: ¶ms.owner, |
| 450 | method: METHOD, |
| 451 | target: None, |
| 452 | }); |
| 453 | if let Err(refused) = redeemed { |
| 454 | if refused.violation { |
| 455 | cx.violation( |
| 456 | "too many invalid core/call tickets from one host process".to_string(), |
| 457 | ); |
| 458 | } |
| 459 | return Err(refuse( |
| 460 | error_code::REFUSED, |
| 461 | refused.reason.describe().to_string(), |
| 462 | )); |
| 463 | } |
| 464 | // The redemption proved the ticket is live and ours; the owner must |
| 465 | // still be the current one of this tier. |
| 466 | let live = shared |
| 467 | .registry |
| 468 | .lock() |
| 469 | .expect("registry lock") |
| 470 | .tier_of(¶ms.owner) |
| 471 | == Some(tier); |
| 472 | let Some(invocation) = self.invocation(¶ms.ticket).filter(|_| live) else { |
| 473 | return Err(refuse( |
| 474 | error_code::REFUSED, |
| 475 | "the invocation this core/call belongs to has ended".to_string(), |
| 476 | )); |
| 477 | }; |
| 478 | shared |
| 479 | .check_selection( |
| 480 | invocation |
| 481 | .plugins |
| 482 | .as_ref() |
| 483 | .and_then(|plugins| plugins.caller_selection()), |
| 484 | invocation.plugins.as_deref(), |
| 485 | ¶ms.owner.plugin_id, |
| 486 | &invocation.content_hash, |
| 487 | invocation.scope.as_ref(), |
| 488 | ) |
| 489 | .map_err(|message| refuse(error_code::REFUSED, message))?; |
| 490 | // Withdrawn when the host cancels this request, its owner is revoked, |
| 491 | // the host exits (`cx.cancel`), or the invocation ends. |
| 492 | let withdraw = invocation.cancel.child_token(); |
| 493 | { |
| 494 | let (withdraw, host) = (withdraw.clone(), cx.cancel.clone()); |
| 495 | tokio::spawn(async move { |
| 496 | tokio::select! { |
| 497 | () = host.cancelled() => withdraw.cancel(), |
| 498 | () = withdraw.cancelled() => {} |
| 499 | } |
| 500 | }); |
| 501 | } |
| 502 | let outcome = invocation |
| 503 | .calls |
| 504 | .call(params.name, params.input, Some(&withdraw)) |
| 505 | .await; |
| 506 | shared |
| 507 | .check_selection( |
| 508 | invocation |
| 509 | .plugins |
| 510 | .as_ref() |
| 511 | .and_then(|plugins| plugins.caller_selection()), |
| 512 | invocation.plugins.as_deref(), |
| 513 | ¶ms.owner.plugin_id, |
| 514 | &invocation.content_hash, |
| 515 | invocation.scope.as_ref(), |
| 516 | ) |
| 517 | .map_err(|message| refuse(error_code::REFUSED, message))?; |
| 518 | let result = match outcome { |
| 519 | Ok(response) => Ok(wire_from_response(response)), |
| 520 | Err(NestedFailure::Rejected { decision, message }) => Err(refuse( |
| 521 | if decision == NestedDecision::Denied { |
| 522 | error_code::DENIED |
| 523 | } else { |
| 524 | error_code::REFUSED |
| 525 | }, |
| 526 | message, |
| 527 | )), |
| 528 | Err(NestedFailure::Unavailable(message)) => Err(refuse( |
| 529 | if withdraw.is_cancelled() { |
| 530 | error_code::CANCELLED |
| 531 | } else { |
| 532 | error_code::NOT_AVAILABLE |
| 533 | }, |
| 534 | message, |
| 535 | )), |
| 536 | }; |
| 537 | // Stop the forwarder when the call is over. |
| 538 | withdraw.cancel(); |
| 539 | result.map(|wire| serde_json::to_value(wire).expect("wire results serialize")) |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | /// An extension tool's answer to its `core/call`: the tool's text (and its |
| 544 | /// structured JSON when the content was JSON), bounded as code mode bounds it. |
| 545 | pub(crate) fn wire_from_response(response: ToolCallResponse) -> ToolResultWire { |
| 546 | if !response.ok { |
| 547 | let text = match response.result { |
| 548 | Value::String(text) => text, |
| 549 | other => other.to_string(), |
| 550 | }; |
| 551 | return ToolResultWire { |
| 552 | content: vec![ContentBlockWire::Text { text }], |
| 553 | is_error: true, |
| 554 | structured: None, |
| 555 | }; |
| 556 | } |
| 557 | let content = response |
| 558 | .result |
| 559 | .get("content") |
| 560 | .cloned() |
| 561 | .unwrap_or(Value::Null); |
| 562 | let (mut text, structured) = match content { |
| 563 | Value::String(text) => (text, None), |
| 564 | other => (other.to_string(), Some(other)), |
| 565 | }; |
| 566 | if let Some(cut) = response |
| 567 | .result |
| 568 | .get("truncated") |
| 569 | .filter(|truncated| !truncated.is_null()) |
| 570 | { |
| 571 | let number = |key: &str| cut.get(key).and_then(Value::as_u64).unwrap_or(0); |
| 572 | text.push_str(&format!( |
| 573 | "\n[output truncated: {} bytes in all, the first {} are shown]", |
| 574 | number("original_bytes"), |
| 575 | number("kept_bytes") |
| 576 | )); |
| 577 | } |
| 578 | ToolResultWire { |
| 579 | content: vec![ContentBlockWire::Text { text }], |
| 580 | is_error: false, |
| 581 | structured, |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | /// Holds an invocation open. Dropping it (the `tool/call` ended or its future |
| 586 | /// was dropped) revokes the ticket and withdraws whatever is still pending. |
| 587 | pub(crate) struct InvocationGuard { |
| 588 | core_calls: Arc<CoreCalls>, |
| 589 | ticket: Ticket, |
| 590 | invocation: Arc<Invocation>, |
| 591 | } |
| 592 | |
| 593 | impl InvocationGuard { |
| 594 | /// The ticket id to put in this call's `tool/call` (and nowhere else). |
| 595 | pub(crate) fn ticket(&self) -> &str { |
| 596 | self.ticket.expose() |
| 597 | } |
| 598 | |
| 599 | /// The clock the `tool/call` deadline runs on: paused while one of this |
| 600 | /// invocation's core calls waits on the gate. |
| 601 | pub(crate) fn clock(&self) -> Arc<Mutex<PauseClock>> { |
| 602 | self.invocation.calls.clock() |
| 603 | } |
| 604 | |
| 605 | /// The receipts of the core calls made so far, bounded, for the tool's |
| 606 | /// result metadata; `None` when it made none. |
| 607 | pub(crate) fn receipts(&self) -> Option<Value> { |
| 608 | let receipts = self.invocation.calls.receipts_json(RECEIPTS_ATTACHED); |
| 609 | (receipts["total"].as_u64().unwrap_or(0) > 0).then_some(receipts) |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | impl Drop for InvocationGuard { |
| 614 | fn drop(&mut self) { |
| 615 | self.core_calls.end(&self.ticket); |
| 616 | } |
| 617 | } |
| 618 |