diff --git a/CHANGELOG.md b/CHANGELOG.md
index e62edded..7cb1a186 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,89 @@
+# v0.5.55 (2026-08-14)
+
+## Features
+- **Auth**: native SAML 2.0 SSO alongside OIDC — AuthnRequest generation, ACS
+  assertion handling, SP metadata export, admin config test, replay-protected
+  via a `saml_state` cookie matched against `InResponseTo`
+- **Providers**: add Alibaba Token Plan (`token-plan.ap-southeast-1`) — the
+  fourth Alibaba key type, Singapore-only and OpenAI-compatible transport only
+- **Providers**: add `glm-5.3` to GLM Coding and GLM (China)
+- **Providers**: Kimchi accepts API keys as well as OAuth (dual auth), with a
+  working Test Connection for both modes
+- **Antigravity**: add Gemini 3.7 Flash and its tiered high/medium/low variants
+  (also in the Gemini registry) with pricing and quota tracking
+- **TTS**: add Fish Audio — model id travels in an HTTP `model` header, voice
+  is a `reference_id` (preset or cloned voice model)
+- **OpenCode-Go**: route by request format via declared transports instead of
+  forcing every client into `/messages` — Codex/OpenAI clients no longer pay a
+  lossy Responses→OpenAI→Claude double translation. Per-model `supportedFormats`
+  guard; the bespoke executor is gone (its shared `_lastModel` cache could cross
+  auth headers between concurrent requests)
+- **Usage**: dedup + cache Claude quota calls (120s TTL keyed by access token,
+  in-flight promise dedup, last-good read on soft failure) to stop multiple
+  tabs tripping 429; manual refresh (↻) sends `force=1` to bypass the cache
+
+## Fixes
+- **Docker**: ship `sql.js` in the image so the pure-JS DB fallback can start —
+  file tracing carried the package's JS without `dist/sql-wasm.wasm`, so a
+  container with no native driver aborted with ENOENT and never got a database
+  (#3248)
+- **Usage**: read Gemini `usageMetadata` out of the antigravity `{ response }`
+  envelope — every non-streaming antigravity request logged `IN 0 | OUT 0`
+  (#3260)
+- **Claude**: re-anchor passthrough cache breakpoints — the client's own
+  `cache_control` markers point at pre-normalization offsets, so the tail was
+  re-cached every request. Last system block and last tool pinned at 1h TTL,
+  last assistant turn at 5m, mid-conversation system messages folded into the
+  neighbouring user turn instead of hoisted into `body.system`
+- **Combos**: detect images from Hermes and attachment payloads (`images[]`,
+  `experimental_attachments`, message-level `image_url`/`audio_url`, inline
+  `data:` URIs) so the Vision Adapter auto-switch fires for Hermes/Ollama/
+  Vercel AI SDK shapes
+- **Kiro**: intercept chat via `x-amz-target` — Kiro IDE 1.0.228+ moved
+  `GenerateAssistantResponse` to `POST /` + header, bypassing MITM. Also emit
+  the now-mandatory initial-response frame and map the `auto` model slot
+- **Kiro**: report real output tokens and stop discarding usable turns
+- **Qoder**: detect billing blocks at stream start and return a synthetic 403
+  so combo/account fallback triggers instead of leaking the error into chat
+- **Antigravity**: strip competitive system prompts (Zed IDE's Claude-agent
+  prompt) that Antigravity flags with a 429 Quota Exhausted
+- **OpenCode**: send the official client fingerprint on free-tier requests so
+  the Console stops classifying traffic as unidentified and rate-limiting it;
+  session id resolves conversation-stable to preserve prompt caching
+- **Responses**: don't close the message on an empty `tool_calls` array — some
+  providers attach one to every chunk, and the truthy check ended the message
+  on the first content token (#3234)
+- **Translator**: preserve `prompt_cache_key` when converting chat to responses
+- **Models**: expose snake_case token limits on `/v1/models`
+- **Combos**: strip `stream_options` from the Fusion panel fan-out to avoid a
+  DeepSeek 400 (#3024); raise the dashboard model-test probe budget to 1024 and
+  soft-pass reasoning-only responses (#3010)
+- **Headroom**: the toggle reflects the `headroomEnabled` setting even when the
+  proxy is down — it previously showed OFF while the engine kept calling
+  `/v1/compress`; proxy status stays visible via the status chip
+- **Hermes**: add the `api_key` parameter to the model block in YAML config
+- **Providers**: add llm7 to provider test support
+
+## Docs
+- **i18n**: add Spanish, French, and Brazilian Portuguese README translations
+
+## Security
+- **Real IP**: `x-9r-real-ip` and the Host fallback were trusted from
+  client-controlled headers whenever `custom-server.js` was not in the request
+  path (`npm run start`, `start:bun`), letting a remote caller pose as local to
+  skip API key auth and reach `LOCAL_ONLY_PATHS` (`/api/mcp/*`,
+  `/api/tunnel/enable`, `/api/auth/reset-password`). The server now stamps a
+  per-process `x-9r-peer-token` on every request it sanitizes and only trusts
+  `x-9r-real-ip` behind it — falling back to Host in development and failing
+  closed in production (GHSA-pjm4-8fpg-f9p6). Also fixes IPv6 loopback
+  detection (`::1`, `::ffff:127.0.0.1`) and routes `npm run start` /
+  `start:bun` through `custom-server.js`
+- **Search**: `resolveBaseUrl()` rejects client-supplied non-public baseUrls
+  (SSRF guard on `/v1/search`)
+- **Login**: fresh-install remote login with the default password returns 403
+  without issuing a JWT
+- **Usage**: `/api/usage/request-details` redacts request/response payloads
+
 # v0.5.50 (2026-08-05)
 
 ## Features
diff --git a/cli/package.json b/cli/package.json
index 98ad8cdc..2fe55c9c 100644
--- a/cli/package.json
+++ b/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "9router",
-  "version": "0.5.50",
+  "version": "0.5.55",
   "description": "9Router CLI - Start and manage 9Router server",
   "bin": {
     "9router": "./cli.js"
diff --git a/package.json b/package.json
index 39d71447..f1c2c97f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "9router-app",
-  "version": "0.5.50",
+  "version": "0.5.55",
   "description": "9Router web dashboard",
   "private": true,
   "scripts": {