fix(spec)!: Standardize spelling of "canceled" to use American Spelling throughout by madankumarpichamuthu · Pull Request #1283 · a2aproject/A2A

madankumarpichamuthu · 2025-12-05T22:25:38Z

Fixes inconsistent spelling of cancel-related terms across the specification and documentation. The proto definition uses TASK_STATE_CANCELLED (double 'l'), but various documentation files were using single 'l' spelling.

Changes:

cancelled → canceled
cancellable → cancelable
TaskNotCancellableError → TaskNotCancelableError

Files modified:

docs/specification.md
docs/llms.txt
docs/topics/life-of-a-task.md

All documentation now consistently uses single 'l' to match the proto definition and JSON naming conventions.

Fixes #1270

Release-As: 1.0.0

… documentation Fixes inconsistent spelling of cancel-related terms across the specification and documentation. The proto definition uses TASK_STATE_CANCELLED (double 'l'), but various documentation files were using single 'l' spelling. Changes: - canceled → cancelled (11 instances across 3 files) - cancelable → cancellable (4 instances across 2 files) - TaskNotCancelableError → TaskNotCancellableError (4 instances across 2 files) - URL: task-not-cancelable → task-not-cancellable (1 instance) Files modified: - docs/specification.md - docs/llms.txt - docs/topics/life-of-a-task.md All documentation now consistently uses British English spelling (double 'l') to match the proto definition and JSON naming conventions. Fixes a2aproject#1270

gemini-code-assist · 2025-12-05T22:25:52Z

Summary of Changes

Hello @madankumarpichamuthu, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a spelling inconsistency within the project's documentation and specification. It standardizes the use of 'cancelled' (with double 'l') and 'cancellable' throughout various files, ensuring alignment with the existing TASK_STATE_CANCELLED proto definition and JSON naming conventions. This change improves clarity and uniformity across the project's descriptive content.

Highlights

Spelling Standardization: Consistently updated 'canceled' to 'cancelled' and 'cancelable' to 'cancellable' across the documentation to match proto definitions.
Error Name Alignment: Renamed TaskNotCancelableError to TaskNotCancellableError to align with the new spelling convention.
URL Path Consistency: Modified the URL path task-not-cancelable to task-not-cancellable for uniformity.

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gemini-code-assist

Code Review

This pull request effectively standardizes the spelling of 'cancelled' and 'cancellable' across the documentation, which improves consistency and aligns with the proto definitions. The changes are well-contained and address the issue described. I've found one minor typo in the process, which I've commented on.

docs/specification.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

holtskinner · 2025-12-09T15:50:47Z

I think we should consolidate on the American spelling (and update the spec itself)

In 0.3.0, only one of these British spellings (Cancelled) is used in the grpc spec

A2A/specification/grpc/a2a.proto

Line 169 in 8d57eba

TASK_STATE_CANCELLED = 5;

Every other usage, including in JSON-RPC uses the American spelling.

A2A/specification/json/a2a.json

Line 2447 in 8d57eba

"canceled",

We'll have to have at least one breaking change, but I think it's best to consolidate into the American spelling to have as few as possible. (Canceled, cancelable)

What do you think @darrelmiller ?

Fixes markdown linting errors (MD060) introduced by longer spelling variant. The change from 'TaskNotCancelableError' to 'TaskNotCancellableError' added characters to both the error name and description text. Changes: - Line 570: Added 1 space after error name, removed space before '(e.g.,' - Line 1162: Added 1 space after error name and at end of URL column This ensures all table pipes remain vertically aligned with the header row, satisfying markdownlint's MD060 table alignment requirements. Related to a2aproject#1270 Author: Madan Kumar Pichamuthu

muscariello

@madankumarpichamuthu can you please use American English spelling?

darrelmiller · 2026-01-26T15:49:04Z

I have no opinion which option we use. I only care about consistency. The sentiment seems to be towards the US English, so let's do that.

docs/llms.txt

darrelmiller · 2026-01-27T17:37:54Z

@muscariello to update to just fix the one place where we have a double l. And then we are good to merge.

muscariello

LGTM

Co-authored-by: Darrel <darrmi@microsoft.com>

holtskinner · 2026-01-28T17:14:44Z

I have no opinion which option we use. I only care about consistency. The sentiment seems to be towards the US English, so let's do that.

Based on this, all of the spelling should be back to single-l, not double-l as it currently is. We also have to make sure the actual spec proto is set that way.

darrelmiller · 2026-01-29T00:21:20Z

@muscariello or @madankumarpichamuthu Can you make them single l instead of double ll?

muscariello · 2026-01-29T11:00:17Z

Let me do a pass. I got confused probably ... my fault I asked an Englishman..

Signed-off-by: Luca Muscariello <muscariello@ieee.org>

muscariello · 2026-01-29T12:02:00Z

@holtskinner could you please check again ? I think I covered all the British english spelling left.

holtskinner · 2026-01-29T15:42:59Z

Updated a couple more.

gemini-code-assist

Code Review

This pull request standardizes the spelling of "cancel"-related terms to American English ("canceled", "cancelable"), which is consistent with the PR title. The changes are mostly correct. However, the pull request description is inaccurate and should be updated to reflect the actual changes. For instance, it states "canceled → cancelled", but the changes are the other way around. Additionally, the change from TASK_STATE_CANCELLED to TASK_STATE_CANCELED in specification/grpc/a2a.proto is a breaking change for API consumers and should be highlighted as such. I've also found a minor typo in the documentation.

docs/specification.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

holtskinner · 2026-01-29T15:45:56Z

@gemini-code-assist review

gemini-code-assist

Code Review

This pull request standardizes the spelling of 'cancel'-related terms to the American English spelling ('canceled') across the specification documents and the gRPC proto definition. The changes are consistent and correctly apply the intended spelling. The update to TASK_STATE_CANCELLED in the proto file is a breaking change, which is appropriately marked in the pull request title. My review includes one minor suggestion to restore a space in the documentation for better readability.

docs/specification.md

gemini-code-assist

Code Review

This pull request successfully standardizes the spelling of "canceled" and related terms to American English across the documentation and protobuf definitions. The changes are consistent and improve the specification's uniformity. The update to TASK_STATE_CANCELED in the .proto file is a breaking change, which is correctly indicated in the commit message. I have one minor suggestion to improve stylistic consistency in one of the documentation files.

docs/topics/streaming-and-async.md

🤖 I have created a release *beep* *boop* --- ## [1.0.0](v0.3.0...v1.0.0) (2026-03-12) ### ⚠ BREAKING CHANGES * **spec:** Combine `TaskPushNotificationConfig` and `PushNotificationConfig` ([#1500](#1500)) * **spec:** remove duplicated ID from the create task push config request ([#1487](#1487)) * **spec:** pluralize configs in `ListTaskPushNotificationConfigs` ([#1486](#1486)) * **spec:** Add LF prefix to the package. ([#1474](#1474)) * **spec:** Switch to non-complex IDs in requests ([#1389](#1389)) * **spec:** Standardize spelling of "canceled" to use American Spelling throughout ([#1283](#1283)) * **spec:** Align enum format with ADR-001 ProtoJSON specification ([#1384](#1384)) * **spec:** Remove redundant `final` field from `TaskStatusUpdateEvent` ([#1308](#1308)) * **spec:** Move `extendedAgentCard` field to `AgentCapabilities` ([#1307](#1307)) * **spec:** Fixes for the last_updated_after field ([#1358](#1358)) * **spec:** modernize oauth 2.0 flows - remove implicit/password, add device code / pkce ([#1303](#1303)) * **spec:** Make "message" field name consistent between protocol bindings ([#1302](#1302)) * **spec:** Remove deprecated fields from a2a.proto for v1.0 release ([#1301](#1301)) * **spec:** Rename `supportsAuthenticatedExtendedCard` to `supportsExtendedAgentCard` ([#1222](#1222)) * **spec:** Remove v1s from a2a url http bindings * **spec:** Large refactor of specification to separate application protocol definition from mapping to transports ### Features * **spec:** Add `tasks/list` method with filtering and pagination to the specification ([0a9f629](0a9f629)) * **spec:** modernize oauth 2.0 flows - remove implicit/password, add device code / pkce ([#1303](#1303)) ([525ff38](525ff38)) * **spec:** Natively Support Multi-tenancy on gRPC through an additional scope field on the request. ([#1195](#1195)) ([cfbce32](cfbce32)), closes [#1148](#1148) * **spec:** Provide ability for SDKs to be backwards compatible. ([#1401](#1401)) ([227e249](227e249)) * **spec:** Remove v1s from a2a url http bindings ([1bd263f](1bd263f)) ### Bug Fixes * Add missing metadata field to Part message in gRPC specification ([#1019](#1019)) ([b3b266d](b3b266d)), closes [#1005](#1005) * Add name field to FilePart protobuf message ([#983](#983)) ([2b7cb6f](2b7cb6f)), closes [#984](#984) * Clarify blocking calls return on interrupted states ([#1403](#1403)) ([0655ff3](0655ff3)) * **doc:** Makes JSON-RPC SendMessage response clearer ([#1241](#1241)) ([5792804](5792804)) * **docs:** Clearer wording around context id. ([#1588](#1588)) ([dec790a](dec790a)) * **grpc:** Fix inconsistent property name between gRPC and JSON-RPC in Message object ([#1100](#1100)) ([2a1f819](2a1f819)) * **grpc:** missing field in gRPC spec - state_transition_history ([#1138](#1138)) ([a2de798](a2de798)), closes [#1139](#1139) * **grpc:** Update `CreateTaskPushNotificationConfig` endpoint to `/v1/{parent=tasks/*/pushNotificationConfigs}` ([#979](#979)) ([911f9b0](911f9b0)) * **proto:** Add icon_url to a2a.proto ([#986](#986)) ([17e7f62](17e7f62)) * **proto:** Adds metadata field to A2A DataPart proto ([#1004](#1004)) ([a8b45dc](a8b45dc)) * Remove unimplemented state_transition_history capability field ([#1396](#1396)) ([c768a44](c768a44)), closes [#1228](#1228) * Restore CreateTaskPushNotificationConfig method naming ([#1402](#1402)) ([d14f410](d14f410)) * Revert "chore(gRPC): Update a2a.proto to include metadata on GetTaskRequest" ([#1000](#1000)) ([e6b8c65](e6b8c65)) * Simplify Part message structure by flattening FilePart and DataPart ([#1411](#1411)) ([bfae8f7](bfae8f7)) * **spec:** Add LF prefix to the package. ([#1474](#1474)) ([a54e809](a54e809)) * **spec:** add metadata to `CancelTaskRequest` ([#1485](#1485)) ([c441b91](c441b91)), closes [#1484](#1484) * **spec:** Added clarification on timestamps in HTTP query params ([#1425](#1425)) ([6292104](6292104)) * **spec:** Added clarifying text around messages and artifacts ([#1424](#1424)) ([b03d141](b03d141)) * **spec:** Adjust field number for `ListTasksRequest.tenant` to prevent missing number ([#1470](#1470)) ([cd16c52](cd16c52)) * **spec:** Clarify contextId behavior when message is sent with taskId but without contextId ([#1309](#1309)) ([a336a5a](a336a5a)) * **spec:** Clarify versioning strategy and client responsibilities in protocol specification ([#1259](#1259)) ([a4afeea](a4afeea)) * **spec:** Fix/1251 clarify authentication scheme ([#1256](#1256)) ([3e6c7db](3e6c7db)) * **spec:** Fixes for the last_updated_after field ([#1358](#1358)) ([0e204bf](0e204bf)) * **spec:** Make "message" field name consistent between protocol bindings ([#1302](#1302)) ([1e5f462](1e5f462)), closes [#1230](#1230) * **spec:** make `history_length` optional ([#1071](#1071)) ([0572953](0572953)) * **spec:** pluralize configs in `ListTaskPushNotificationConfigs` ([#1486](#1486)) ([cf735cb](cf735cb)) * **spec:** Remove config from binding. ([#1587](#1587)) ([010b9cc](010b9cc)) * **spec:** Remove deprecated fields from a2a.proto for v1.0 release ([#1301](#1301)) ([60f83c3](60f83c3)), closes [#1227](#1227) * **spec:** remove duplicated ID from the create task push config request ([#1487](#1487)) ([393898d](393898d)) * **spec:** Remove metadata field from ListTasksRequest ([#1235](#1235)) ([b6ef9ee](b6ef9ee)) * **spec:** Remove reserved and fix tags ordering ([#1494](#1494)) ([1997c9d](1997c9d)) * **spec:** Rename `supportsAuthenticatedExtendedCard` to `supportsExtendedAgentCard` ([#1222](#1222)) ([c196824](c196824)), closes [#1215](#1215) * **spec:** Standardize spelling of "canceled" to use American Spelling throughout ([#1283](#1283)) ([4dd980f](4dd980f)) * **spec:** Suggest Unique Identifier fields to be UUID ([#966](#966)) ([00cf76e](00cf76e)) * **spec:** Switch to non-complex IDs in requests ([#1389](#1389)) ([2596c1c](2596c1c)), closes [#1390](#1390) * **spec:** Update security schemes example ([#1364](#1364)) ([f9a8f5b](f9a8f5b)) * Update the Java tutorials and descriptions ([#1181](#1181)) ([202aa06](202aa06)) ### Documentation * **spec:** Align enum format with ADR-001 ProtoJSON specification ([#1384](#1384)) ([810eaa1](810eaa1)), closes [#1344](#1344) ### Code Refactoring * **spec:** Combine `TaskPushNotificationConfig` and `PushNotificationConfig` ([#1500](#1500)) ([d1ed0da](d1ed0da)) * **spec:** Large refactor of specification to separate application protocol definition from mapping to transports ([b078419](b078419)) * **spec:** Move `extendedAgentCard` field to `AgentCapabilities` ([#1307](#1307)) ([40d6286](40d6286)) * **spec:** Remove redundant `final` field from `TaskStatusUpdateEvent` ([#1308](#1308)) ([5b101cc](5b101cc)) --- This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please). Co-authored-by: Amye Scavarda Perrin <amye@amye.org> Co-authored-by: Holt Skinner <13262395+holtskinner@users.noreply.github.com>

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holtskinner assigned darrelmiller Dec 10, 2025

madankumarpichamuthu force-pushed the fix/1270-standardize-cancelled-spelling branch from 1d725f3 to 88235d1 Compare December 11, 2025 21:06

madankumarpichamuthu and others added 3 commits January 6, 2026 21:58

Merge branch 'main' into fix/1270-standardize-cancelled-spelling

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Merge branch 'main' into fix/1270-standardize-cancelled-spelling

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fix(spec): standardize on single-l 'canceled' spelling

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Signed-off-by: Luca Muscariello <muscariello@ieee.org>

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holtskinner changed the title ~~docs(spec): Standardize spelling to 'cancelled' and 'cancellable' throughout…~~ docs(spec): Standardize spelling of "canceled" to use American Spelling throughout Jan 29, 2026

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holtskinner changed the title ~~fix(spec): Standardize spelling of "canceled" to use American Spelling throughout~~ fix(spec)!: Standardize spelling of "canceled" to use American Spelling throughout Jan 29, 2026

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chore(main): release 1.0.0 #1221

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