Sync upstream Buzz 45f4b91a3614 - #17
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## Summary - render shared-agent instructions as literal text so Markdown cannot conceal spoiler contents, link destinations, or image sources - reject non-reviewable Unicode controls at every agent-definition boundary while preserving legitimate rendered emoji sequences - verify shared catalog event IDs and signatures before trusting authorship, coordinates, pagination, or executable content - preserve the exact system-prompt bytes between review and execution instead of silently stripping or normalizing content ## Security rationale Shared system prompts are executable configuration. Previously, catalog prompts were projected through the chat Markdown renderer, which could hide text, replace link destinations with benign labels, and turn image syntax into remote loads. Zero-width and bidirectional controls could also make reviewed text differ from what the agent executes. This change establishes a review invariant: the prompt a user sees is the prompt the agent executes. Definitions that cannot be reviewed faithfully are rejected rather than rewritten. Catalog events must also pass Nostr ID/signature verification before they can claim a publisher, coordinate, or cursor. ## What changed - catalog instructions render as exact literal text rather than rich Markdown - catalog relay events are verified on a fresh wire-shaped object before paging, coordinate selection, attribution, or projection - forged content, pubkeys, signatures, and invalid newer heads are ignored and cannot shadow a valid signed definition - TypeScript catalog parsing rejects unsafe remote definitions before they reach the UI - shared Rust validation covers persona create/update/import, inbound relay sync, definition-less managed-agent sync, and catalog publication paths - definition-less managed agents now fail closed on local create, local update, and publication before persistence or relay retention - linked managed agents validate their local name while treating the persona definition as authoritative; their inert record-level prompt is not executed or published - names reject layout controls; prompts retain ordinary newlines and tabs - legitimate emoji composition is supported, including contextual VS16, ZWJ, skin-tone, family, flag, and keycap sequences - detached selectors/joiners, bidirectional controls, tag characters, zero-width concealment, and other default-ignorables remain rejected - names are bounded to 128 characters and prompts to 64 KiB - contributor guidance documents the byte-for-byte review requirement for future sharing paths Validation reports the offending code point and never silently removes it. ## E2E recording [buzz-shared-agent-security-e2e.webm](https://github.com/user-attachments/assets/44d6b75f-0877-490f-bda4-a716fae3f700) The recording demonstrates: - a safe definition remains visible - a prompt containing zero-width `U+200B` is rejected - a name containing bidi override `U+202E` is rejected - the prompt is preserved exactly - spoiler, link, and image syntax remains literal and does not render or load ## Verification Passed locally: - `just test`: all 10 unit and Docker-backed integration stages - desktop frontend unit suite: 4,295 tests - persona catalog relay unit suite: 32 tests, including forged-event and cursor-shadowing cases - focused Rust definition-validation coverage: 3 local create/update tests and 6 publication-filtered tests - complete desktop Tauri library suite after rebase: 2,263 passed, 14 ignored, 0 failed - desktop Tauri clippy with warnings denied and Rust formatting - complete agent Playwright spec: 34 tests - the exact formerly failing `inbox-edit` immediate-attachment smoke test after rebase: 1 test - focused shared-agent publish, literal-review, hidden-control, signature, and cross-member import Playwright coverage - desktop E2E production build and TypeScript typecheck - changed-file formatting/lint and file-size ratchet - pre-commit secret scan and DCO signoff The branch was rebased onto current `main`, which includes the upstream attachment-button label fix. Fresh post-rebase GitHub CI is green for every required and selected check: Desktop Core, all four Desktop Smoke E2E shards, both Desktop E2E Integration shards and their aggregate, Desktop E2E Relay, Desktop Build (macOS), Windows Rust, Rust Lint, DCO, security scanners, and Desktop Release Candidate. The previously failing `Desktop Smoke E2E (3)` shard now passes. The repository-wide desktop check also reports existing CSS formatting/`!important` findings in `components.css` and `terminal.css`; neither file is changed by this PR. GitHub's Desktop Core lint and format stage passes on the rebased branch. --------- Signed-off-by: Alex Rosenzweig <arosenzweig@squareup.com>
## Summary - add a permission-gated mobile community invite page - create, copy, and natively share configurable invite links - invite a validated npub directly with member/admin role selection - reuse Buzz profile actions, search styling, settings rows, and modal sheets ## Validation - `just mobile-check` - `flutter test` (1,275 tests) - Pixel and iPhone review builds installed and launched --------- Signed-off-by: kenny lopez <klopez4212@gmail.com> Signed-off-by: Kenny Lopez <klopez4212@gmail.com> Signed-off-by: Fast Fizz <2df81cb51f05a9d5387ef24d7b9ecb8fcdfcd1c70ffabc67061c9596e1b5b1c4@buzz.block.builderlab.xyz> Co-authored-by: Carl <3c4caeafb646d23867f1c4832e68211d77e2561946171625f75c3ce1a3f2670f@buzz.block.builderlab.xyz> Co-authored-by: Fast Fizz <2df81cb51f05a9d5387ef24d7b9ecb8fcdfcd1c70ffabc67061c9596e1b5b1c4@buzz.block.builderlab.xyz>
## Summary - reuse the channel member snapshot so first-use `@` suggestions appear immediately - reduce selection-only composer rebuilds so iOS selection handles stay responsive - make Return insert a newline, send only from the composer button, and animate multiline growth with reduced-motion support ## Validation - `just mobile-check` - `just mobile-test` — 1,271 tests passed - signed iPhone Release and Pixel 10 debug builds installed and launched - `just ci` passed mobile, Rust, desktop, and web checks until the unrelated `buzz-terminal` lifecycle test timed out waiting for `$0`; reproduced unchanged in isolation --------- Signed-off-by: kenny lopez <klopez4212@gmail.com> Signed-off-by: Fast Fizz <2df81cb51f05a9d5387ef24d7b9ecb8fcdfcd1c70ffabc67061c9596e1b5b1c4@buzz.block.builderlab.xyz Signed-off-by: Fast Fizz <2df81cb51f05a9d5387ef24d7b9ecb8fcdfcd1c70ffabc67061c9596e1b5b1c4@buzz.block.builderlab.xyz> Co-authored-by: Fast Fizz <2df81cb51f05a9d5387ef24d7b9ecb8fcdfcd1c70ffabc67061c9596e1b5b1c4@buzz.block.builderlab.xyz>
**Category:** improvement **User Impact:** Compact link previews now use a single-line title and smaller thumbnail, making conversations easier to scan. **Problem:** Compact previews gave long titles and oversized thumbnails too much visual weight in the message timeline. **Solution:** Keep titles to one ellipsized line and reduce image thumbnails to a 104×64 treatment while preserving the existing wide aspect ratio; Rich previews remain unchanged. <details> <summary>File changes</summary> **desktop/src/shared/ui/compact-link-preview-attachment.tsx** Tightens the Compact presentation with a single-line title and smaller wide thumbnail, leaving Rich previews untouched. **desktop/tests/e2e/messaging.spec.ts** Adds focused coverage for title overflow, exact 64px card and 104×64 thumbnail geometry, and successful decoded-image rendering using a realistic fixture, plus an optional visual capture. **desktop/tests/fixtures/github-pr-5629-og.png** Provides realistic visible image bytes for the compact-preview image-rendering E2E path. </details> ## Reproduction steps 1. Launch the desktop app with link preview style set to Compact. 2. Send a link whose preview has an image and a long title. 3. Confirm the thumbnail renders at the smaller wide size and the title truncates to one line with an ellipsis. 4. Switch link preview style to Rich and confirm its presentation is unchanged. ## Screenshot  --------- Signed-off-by: Taylor Ho <taylorkmho@gmail.com> Co-authored-by: Carl <acda9e433d19dcd0e6b6840f7f4b98f3a56f1fab98049d444c087019e6d36560@buzz.block.builderlab.xyz>
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Automated upstream sync
This PR integrates the newly mirrored block/buzz:main into dcm-production.
This PR never merges automatically. Review the complete diff, migrations, configuration changes, and all required checks before merging. Merge using Create a merge commit so upstream ancestry is preserved.
Recovery tag:
dcm-before-upstream-20260813-183513-45f4b91a3614Upstream commit:
45f4b91a36145f2ce642548c34f699f1b529bcf5Upstream commits (first 20)\n- 45f4b91 fix(desktop): more compact "compact" link previews (block#5629)