docs: address PR review comments on Bedrock docs

- Fix CLI auth command: `altimate-code auth login --provider amazon-bedrock`
- Clarify cross-region prefixing is conditional on model family + region
- Add "Models prefixed" column to region prefix table
- Fix backwards "unprefixed ID" guidance with accurate pass-through behavior
- Add warning about no option to disable auto-prefixing
- Fix log line format to match actual `service=config loading config from ...`
- Remove ambiguous "provide credentials directly" wording
- Fix Provider Options Reference: `options.region/profile/baseURL` not top-level

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: suryaiyer95

docs/docs/configure/bedrock-custom-endpoints.md

@@ -34,7 +34,7 @@ You need one of the following:
     ```
 
     !!! tip
-        If your organization uses the Altimate Code TUI, you can store the token via `altimate-code auth amazon-bedrock` instead of exporting it in your shell profile.
+        If your organization uses the Altimate Code TUI, you can store the token via `altimate-code auth login --provider amazon-bedrock` instead of exporting it in your shell profile.
 
 === "AWS Credential Chain"
 
@@ -107,27 +107,34 @@ The status bar should display your selected model under Amazon Bedrock.
 
 ## Cross-region model ID prefixing
 
-Altimate Code automatically prepends a region prefix to model IDs for cross-region inference. For example, with `region: "us-east-1"` the model ID `anthropic.claude-sonnet-4-6-v1` is sent to the gateway as `us.anthropic.claude-sonnet-4-6-v1`.
+Altimate Code may prepend a region prefix to model IDs for cross-region inference when the selected model and region require it. For example, with `region: "us-east-1"` the model ID `anthropic.claude-sonnet-4-6-v1` is sent to the gateway as `us.anthropic.claude-sonnet-4-6-v1`.
 
-| Your region | Prefix applied |
-|-------------|---------------|
-| `us-*` (except GovCloud) | `us.` |
-| `eu-*` | `eu.` |
-| `ap-northeast-1` (Tokyo) | `jp.` |
-| `ap-southeast-2`, `ap-southeast-4` (Australia) | `au.` |
-| Other `ap-*` | `apac.` |
+Prefixing is conditional on **both** the region and the model family:
 
-**If your gateway expects the prefixed ID** (e.g., `us.anthropic.claude-sonnet-4-6-v1`), no changes are needed — this is the default behavior.
+| Your region | Prefix | Models prefixed |
+|-------------|--------|-----------------|
+| `us-*` (except GovCloud) | `us.` | Claude, Nova, DeepSeek |
+| `eu-*` | `eu.` | Claude, Nova Lite/Micro, Llama 3, Pixtral |
+| `ap-northeast-1` (Tokyo) | `jp.` | Claude, Nova Lite/Micro/Pro |
+| `ap-southeast-2`, `ap-southeast-4` (Australia) | `au.` | Claude Sonnet 4.5, Claude Haiku |
+| Other `ap-*` | `apac.` | Claude, Nova Lite/Micro/Pro |
 
-**If your gateway expects the unprefixed ID**, include the prefix in the model name yourself to skip auto-prefixing:
+Models not listed in the table for a given region are **not** prefixed.
+
+**If your gateway expects the prefixed ID** (e.g., `us.anthropic.claude-sonnet-4-6-v1`), no changes are needed — this is the default behavior for supported models.
+
+**If your gateway handles routing independently and expects the bare model ID**, you can force a specific model ID by including a recognized prefix yourself:
 
 ```json
 {
   "model": "amazon-bedrock/us.anthropic.claude-sonnet-4-6-v1"
 }
 ```
 
-When the model ID already starts with a recognized prefix (`us.`, `eu.`, `global.`, `jp.`, `apac.`, `au.`), auto-prefixing is skipped and the ID is passed through as-is.
+When the model ID already starts with a recognized prefix (`us.`, `eu.`, `global.`, `jp.`, `apac.`, `au.`), auto-prefixing is skipped and the ID is passed through as-is. Note that this does **not** strip the prefix — the full prefixed ID is what gets sent to the gateway.
+
+!!! warning
+    There is currently no config option to disable auto-prefixing entirely. If your gateway requires bare (unprefixed) model IDs and the model would normally be prefixed, contact your platform team or open an issue.
 
 ## Troubleshooting
 
@@ -145,7 +152,7 @@ Look for these lines in the logs (`~/.local/share/altimate-code/log/*.log`):
 
 | Log line | Meaning |
 |----------|---------|
-| `service=config path=...altimate-code.json loading` | Config file is being read |
+| `service=config loading config from ...altimate-code.json` | Config file is being read |
 | `service=provider providerID=amazon-bedrock found` | Provider detected successfully |
 | `service=provider providerID=amazon-bedrock` + error | Auth or endpoint failure |
 

docs/docs/configure/providers.md

@@ -84,7 +84,7 @@ Available models: `claude-opus-4-6`, `claude-sonnet-4-6`, `claude-haiku-4-5-2025
 }
 ```
 
-Uses the standard AWS credential chain. Set `AWS_PROFILE` or provide credentials directly.
+Uses the standard AWS credential chain: environment variables (`AWS_ACCESS_KEY_ID`/`AWS_SECRET_ACCESS_KEY`), named profiles (`AWS_PROFILE`), SSO sessions, IAM roles, and container credentials.
 
 !!! note
     If you have AWS SSO, IAM roles, or environment credentials (`AWS_ACCESS_KEY_ID` / `AWS_SECRET_ACCESS_KEY`) configured, Bedrock will use your default credential chain automatically.
@@ -330,8 +330,8 @@ The `small_model` is used for lightweight tasks like summarization and context c
 | `baseURL` | `string` | Custom API endpoint URL |
 | `api` | `string` | API type (e.g., `"openai"` for compatible endpoints) |
 | `headers` | `object` | Custom HTTP headers to include with requests |
-| `region` | `string` | AWS region (Bedrock only) |
-| `accessKeyId` | `string` | AWS access key (Bedrock only) |
-| `secretAccessKey` | `string` | AWS secret key (Bedrock only) |
+| `options.region` | `string` | AWS region (Amazon Bedrock only, default: `us-east-1`) |
+| `options.profile` | `string` | AWS named profile (Amazon Bedrock only) |
+| `options.baseURL` | `string` | Custom endpoint URL for Bedrock gateway/proxy (Amazon Bedrock only) |
 | `project` | `string` | GCP project ID (Google Vertex AI only) |
 | `location` | `string` | GCP region (Google Vertex AI only, default: `us-central1`) |