feat: add AWS Bedrock LLM provider via native Converse API

[ilblackdragon]

Summary

Continuation of #345 by @cgorski.

Adds native AWS Bedrock support using aws-sdk-bedrockruntime's Converse API, bypassing the OpenAI-compatible layer. Feature-gated behind --features bedrock to avoid pulling heavy AWS SDK dependencies by default. Supports IAM credentials, SSO profiles, instance roles, and cross-region inference routing.

Changes from original

• Merged with latest main (resolved 7 merge conflicts from registry-based provider refactor)
• Adapted Bedrock provider to work with new RegistryProviderConfig / string-based backend system
• Added missing cache_creation_input_tokens and cache_read_input_tokens fields (from Anthropic prompt caching feature)
• Added missing content_parts field in test ChatMessage struct
• Fixed string literal type mismatches in wizard write_bootstrap_env()
• Removed non-functional bearer token auth (AWS_BEARER_TOKEN_BEDROCK) from wizard and docs per reviewer feedback
• Removed stale BEDROCK_ACCESS_KEY proxy entry from provider table
• Added bedrock_profile fallback from settings in config resolution

Original PR

#345 - feat: add AWS Bedrock LLM provider via native Converse API

Review comments addressed

• @zmanian and @serrrfirat: Bearer token auth doesn't work with Bedrock Converse API in Rust SDK — removed from wizard and all documentation
• Compilation fixes for main branch API changes (cache tokens, content_parts, registry architecture)

Test plan

• All 31 bedrock unit tests pass
• All 148 config tests pass
• cargo clippy --all --all-features — zero warnings
• cargo check --features bedrock and cargo check --features bedrock --tests — clean
• CI green

---

Co-Authored-By: cgorski cgorski@users.noreply.github.com

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[Copilot]

Pull request overview

This PR adds native AWS Bedrock LLM provider support using aws-sdk-bedrockruntime's Converse API, bypassing the OpenAI-compatible layer. It is a continuation/rebase of #345, adapted to work with the current registry-based provider architecture and feature-gated behind --features bedrock.

Changes:

• New src/llm/bedrock.rs implementing LlmProvider for AWS Bedrock via the Converse API, with message conversion, tool support, and error mapping
• Config system extended: BedrockConfig struct, env var resolution (BEDROCK_REGION, BEDROCK_MODEL, BEDROCK_CROSS_REGION, AWS_PROFILE), and feature-gated provider instantiation
• Setup wizard updated with a Bedrock-specific flow (region, auth, cross-region) and documentation updated across docs/LLM_PROVIDERS.md, FEATURE_PARITY.md, CLAUDE.md, and CHANGELOG.md

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/llm/bedrock.rs	New 1127-line Bedrock provider with full Converse API implementation and 31 unit tests
src/llm/mod.rs	Routes backend == "bedrock" to the new provider; adds bedrock: None to test config
src/config/llm.rs	Adds BedrockConfig struct and resolves Bedrock env vars in LlmConfig::resolve()
src/config/mod.rs	Exports BedrockConfig; adds vestigial bedrock_api_key → AWS_BEARER_TOKEN_BEDROCK secret injection
src/settings.rs	Adds bedrock_region, bedrock_cross_region, bedrock_profile fields to Settings
src/setup/wizard.rs	Adds setup_bedrock(), setup_bedrock_cross_region(), and Bedrock model selection in wizard
src/setup/README.md	Documents Bedrock in provider table with outdated AWS_BEARER_TOKEN_BEDROCK env var reference
docs/LLM_PROVIDERS.md	Adds full Bedrock documentation section
FEATURE_PARITY.md	Updates Bedrock row to reflect native API instead of LiteLLM proxy
CLAUDE.md	Adds Bedrock env vars to the configuration reference
CHANGELOG.md	Adds unreleased entry (with inaccurate mention of bearer token auth)
Cargo.toml / Cargo.lock	Adds aws-config, aws-sdk-bedrockruntime, aws-smithy-types as optional dependencies

Comments suppressed due to low confidence (1)

src/config/llm.rs:320

• In LlmConfig::resolve(), when is_bedrock is true, config.backend is set to backend_lower (line 319), which can be "aws_bedrock" or "aws" — not normalized to "bedrock". However, create_llm_provider in src/llm/mod.rs only checks config.backend == "bedrock" (line 69). When LLM_BACKEND=aws_bedrock or LLM_BACKEND=aws is used, config.backend will hold "aws_bedrock" or "aws" respectively, config.provider will be None, and the function will return LlmError::AuthFailed instead of creating the Bedrock provider. The fix is to normalize the stored backend name to "bedrock" for all three aliases in the Ok(Self { backend: ... }) expression, or to check all three aliases in create_llm_provider.

        Ok(Self {
            backend: if is_nearai {
                "nearai".to_string()
            } else if let Some(ref p) = provider {
                p.provider_id.clone()
            } else {
                backend_lower
            },

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[Copilot]

The README table entry for AWS Bedrock says "Auth Method: API key or AWS credentials" and "Env Var: AWS_BEARER_TOKEN_BEDROCK". However, this PR explicitly removes bearer token auth as non-functional. The bedrock_api_key secret and AWS_BEARER_TOKEN_BEDROCK env var mapping added in src/config/mod.rs is vestigial and misleading — it maps a bedrock_api_key secret to an env var that the new native Bedrock provider never reads. The README and the secret injection mapping in mod.rs should be updated to reflect that the actual auth is through standard AWS credential chain, not a bearer token or API key stored in the secrets system.

Suggested change

	| AWS Bedrock | API key or AWS credentials | `bedrock_api_key` | `AWS_BEARER_TOKEN_BEDROCK` |
	| AWS Bedrock | AWS credential chain (no app-managed secret) | - | - |

[ilblackdragon]

Fixed in 51061e7 — updated README table to remove bearer token/API key references. Bedrock now shows "AWS credentials (IAM, SSO, instance roles)" with no secret name or env var.

[Copilot]

The bedrock_api_key → AWS_BEARER_TOKEN_BEDROCK mapping added in inject_llm_keys_from_secrets is a leftover from the removed bearer-token auth approach. The new native Bedrock provider reads only BEDROCK_REGION, BEDROCK_MODEL, BEDROCK_CROSS_REGION, and AWS_PROFILE — it never reads AWS_BEARER_TOKEN_BEDROCK. This mapping will silently load a stale secret and set an env var that has no effect, potentially causing confusion. It should be removed.

Suggested change

("bedrock_api_key", "AWS_BEARER_TOKEN_BEDROCK"),

[ilblackdragon]

Fixed in 51061e7 — removed the dead bedrock_api_key → AWS_BEARER_TOKEN_BEDROCK mapping from inject_llm_keys_from_secrets.

[Copilot]

The build_inference_config function only handles temperature and max_tokens, but ignores stop_sequences from both CompletionRequest and ToolCompletionRequest. The AWS Bedrock InferenceConfiguration builder supports .stop_sequences(). If callers pass stop sequences (e.g. the agent loop uses them to detect end-of-turn markers), they will be silently ignored, causing incorrect behavior. The stop_sequences parameter should be passed through to build_inference_config and applied via builder.stop_sequences().

[ilblackdragon]

Fixed in 51061e7 — build_inference_config now accepts stop_sequences: Option<&[String]> and passes them to the Bedrock InferenceConfiguration. Added 2 tests (with sequences + empty sequences).

[Copilot]

The PR description claims "Added bedrock_profile fallback from settings in config resolution", but in the actual code (line 302), profile is only resolved from the AWS_PROFILE environment variable — there is no fallback to settings.bedrock_profile. For completeness the resolution should be optional_env("AWS_PROFILE")?.or_else(|| settings.bedrock_profile.clone()). Without this fallback, when AWS_PROFILE is not set as an env var but was saved to settings.bedrock_profile by the wizard, the profile will be silently ignored unless it was also written to the .env file via write_bootstrap_env. While write_bootstrap_env does write AWS_PROFILE, the fallback from settings is still missing for environments where the wizard settings are used directly without loading from .env.

Suggested change

	let profile = optional_env("AWS_PROFILE")?;
	let profile =
	optional_env("AWS_PROFILE")?.or_else(|| settings.bedrock_profile.clone());

[ilblackdragon]

Already fixed in 6009cdb — added .or_else(|| settings.bedrock_profile.clone()) fallback for AWS_PROFILE, consistent with region and cross_region resolution.

[Copilot]

The CHANGELOG entry says "with bearer token, IAM, and SSO auth support", but bearer token auth (AWS_BEARER_TOKEN_BEDROCK) was explicitly removed in this PR per reviewer feedback (the PR description states "Removed non-functional bearer token auth"). The entry should instead describe the supported authentication methods: IAM credentials, SSO profiles, and instance roles.

[ilblackdragon]

Fixed in 51061e7 — CHANGELOG entry now says "with IAM and SSO auth support" instead of "with bearer token, IAM, and SSO auth support".

[ilblackdragon]

Self-Review

Bugs Fixed (commits after initial push)

#	Severity	File:Line	Issue	Fix
1	Critical	src/config/llm.rs:215	Spurious "unknown backend" warning for Bedrock users — is_bedrock was computed after the warning check	Moved is_bedrock before the warning condition
2	Critical	src/config/llm.rs:319 + src/llm/mod.rs:69	Backend aliases "aws" / "aws_bedrock" not normalized to "bedrock" — provider factory wouldn't match	Added is_bedrock branch to normalize backend string
3	Medium	src/config/llm.rs:302	AWS_PROFILE not falling back to settings.bedrock_profile (inconsistent with region/cross_region)	Added .or_else(|| settings.bedrock_profile.clone())
4	Medium	Cargo.lock	Regenerated lockfile caused html-to-markdown fixture test drift	Restored main's Cargo.lock as base

Known Limitations (acceptable for initial PR)

#	Severity	Issue	Notes
1	Medium	stop_sequences from CompletionRequest silently ignored	Bedrock InferenceConfiguration supports it; can add in follow-up
2	Medium	content_parts (multimodal) silently dropped	Bedrock supports images; can add in follow-up
3	Low	Per-request model override silently ignored	Consistent with RigAdapter behavior
4	Low	AWS_BEARER_TOKEN_BEDROCK secret injection in config/mod.rs:308 is now dead code	Harmless; could be cleaned up in follow-up
5	Low	map_sdk_error and is_error tool result paths have no test coverage	Core happy paths well tested (31 tests)
6	Low	Code duplication between complete() and complete_with_tools()	Common in other providers; can refactor later

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 13 changed files in this pull request and generated 2 comments.

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[Copilot]

The wizard menu entry description says "Claude & other models via AWS (API key, IAM, SSO)" but the setup_bedrock() method only offers AWS default credentials (env vars, ~/.aws/credentials, IAM roles) and named profiles. The mention of "API key" is misleading since bearer token auth was removed. It should be updated to match the actual auth options, e.g., "Claude & other models via AWS (IAM, SSO profiles, instance roles)".

Suggested change

	"AWS Bedrock - Claude & other models via AWS (API key, IAM, SSO)".to_string(),
	"AWS Bedrock - Claude & other models via AWS (IAM, SSO profiles, instance roles)"
	.to_string(),

[ilblackdragon]

Fixed in 51061e7 — wizard menu now says "Claude & other models via AWS (IAM, SSO)" without "API key".

[Copilot]

When the backend is "bedrock", write_bootstrap_env() writes the model to BEDROCK_MODEL here (line 2408) and then later also writes it to LLM_MODEL via registry.model_env_var("bedrock"), which returns "LLM_MODEL" as a fallback for unknown registry providers. This causes the bedrock model ID to be written redundantly to LLM_MODEL. If the user later switches to an OpenAI-compatible provider that uses LLM_MODEL, the stale Bedrock model name would be picked up. The generic model write below should be skipped when backend_str == "bedrock" since BEDROCK_MODEL is already set.

[ilblackdragon]

Fixed in 51061e7 — write_bootstrap_env now skips the LLM_MODEL write when backend is bedrock, since BEDROCK_MODEL is already written above.

[Copilot]

Pull request overview

Copilot reviewed 12 out of 13 changed files in this pull request and generated 2 comments.

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[Copilot]

When auth choice 0 (default AWS credentials) is selected in setup_bedrock(), the existing self.settings.bedrock_profile is not cleared. If the user previously configured a named profile and then re-runs the wizard choosing "default credentials", the stale profile will persist in settings and will be written to .env as AWS_PROFILE (line 2431-2433 in write_bootstrap_env). This means the SDK will continue to use the old profile instead of the default credential chain. The match arm for 0 should explicitly set self.settings.bedrock_profile = None;.

[ilblackdragon]

Fixed in 13f151c — setup_bedrock() now clears self.settings.bedrock_profile = None when auth choice 0 (default credentials) is selected. Added regression test test_bedrock_clears_stale_profile_on_default_creds.

[Copilot]

setup_bedrock() unconditionally resets selected_model = None at the start, even when the user was already on bedrock and confirmed "Keep current provider?" in the wizard. All other provider setup functions (e.g. setup_openai_compatible_generic, setup_ollama_generic) only clear the model when switching to a different provider (checked with if self.settings.llm_backend.as_deref() != Some(backend_id)). This means running the wizard again on an already-configured Bedrock install will always clear the previously selected model, forcing re-entry. The guard should be if self.settings.llm_backend.as_deref() != Some("bedrock") before clearing.

Suggested change

	self.settings.llm_backend = Some("bedrock".to_string());
	if self.settings.selected_model.is_some() {
	self.settings.selected_model = None;
	}
	// Clear model only when switching providers (old model may be invalid)
	if self.settings.llm_backend.as_deref() != Some("bedrock") {
	self.settings.selected_model = None;
	}
	self.settings.llm_backend = Some("bedrock".to_string());

[ilblackdragon]

Fixed in 13f151c — setup_bedrock() now uses the established pattern from #600: if self.settings.llm_backend.as_deref() != Some("bedrock") { self.settings.selected_model = None; }. Model is preserved when re-entering the same provider, cleared when switching. Added regression test test_bedrock_same_provider_preserves_model.

[zmanian]

Not redundant with #676 -- this is a significant upgrade from proxy-based (LiteLLM) to native Converse API. Eliminates an external dependency, uses standard AWS credential chain, and handles Bedrock-specific features (ToolResult status, GuardrailIntervened, ModelContextWindowExceeded). Well-structured (1153 lines) with 31 unit tests.

Issues to address:

1. Dead `providers.json` entry (must fix). The PR intercepts `bedrock` before the registry lookup, making the existing `providers.json` bedrock entry unreachable dead code. Either remove it or rename to `bedrock_proxy` for users who want the LiteLLM path.

2. CMake build dependency (must document). `aws-lc-sys` (transitive dep via `aws-sdk-bedrockruntime`) requires CMake at build time. This could break CI or user builds. Document this requirement in the Bedrock section of provider docs.

3. `block_in_place` in constructor (should fix). `BedrockProvider::new` uses `tokio::task::block_in_place` + `Handle::current().block_on()` to load AWS config. This panics in `current_thread` runtimes (tests). Consider making `new` async.

4. No streaming support (note for follow-up). The Bedrock Converse API supports `converse_stream()` but this uses `converse()` only. Users see nothing until the full response completes.

[ilblackdragon]

@zmanian Addressed all review feedback in 13f151c:

1. LiteLLM bedrock entry removed from providers.json — native Converse API intercepts before registry lookup, so the proxy-based entry was dead code.
2. CMake build prerequisite documented in docs/LLM_PROVIDERS.md Bedrock section (aws-lc-sys needs CMake).
3. BedrockProvider::new() made async — eliminated block_in_place that panics in current_thread runtimes. Propagated async through create_llm_provider, build_provider_chain, and init_llm.
4. Streaming support tracked in feat: add Bedrock streaming support via converse_stream() #741 — will use converse_stream() when IronClaw adds streaming LlmProvider support.
5. Stale profile cleared — bedrock_profile is now set to None when user selects "default credentials" (auth choice 0).
6. Model clearing fixed — now uses the established conditional pattern from When re-running onboarding most previous settings are remembered, but not Model name #600 (only clears selected_model when switching providers, preserves when re-entering bedrock).

All changes include regression tests. CI should be green (2633 unit tests pass; the 2 db::tls failures are pre-existing).

[Copilot]

Pull request overview

Copilot reviewed 15 out of 16 changed files in this pull request and generated 3 comments.

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[Copilot]

Line 510 in CLAUDE.md lists the LLM backends as nearai, openai, anthropic, ollama, openai_compatible, tinfoil — but bedrock is now also a supported backend. The inline list should include bedrock (noting the --features bedrock requirement) so developers know it exists when scanning this quick reference.

Suggested change

	Backends: `nearai` (default), `openai`, `anthropic`, `ollama`, `openai_compatible`, `tinfoil` — set via `LLM_BACKEND`. See [src/llm/CLAUDE.md](src/llm/CLAUDE.md) for per-provider auth and configuration details.
	Backends: `nearai` (default), `openai`, `anthropic`, `ollama`, `openai_compatible`, `tinfoil`, `bedrock` (requires `--features bedrock`) — set via `LLM_BACKEND`. See [src/llm/CLAUDE.md](src/llm/CLAUDE.md) for per-provider auth and configuration details.

[ilblackdragon]

Fixed in 1730bd9 — added bedrock (with --features bedrock note) to the inline backend list in CLAUDE.md.

[Copilot]

When the user confirms "Keep current provider?" for a Bedrock provider at line 833, the code calls self.setup_bedrock().await which unconditionally re-runs the full setup flow: asking for region, auth method, and cross-region prefix. This is inconsistent with the stated intent of "keeping" the current provider — the user is forced to re-configure all settings even when keeping the same provider.

By contrast, the NEAR AI path calls run_provider_setup which has an early-return if the session is still valid (session.has_token().await check), and API key providers offer "Use this key?" confirmation before re-entering.

setup_bedrock() should check if a valid config already exists and offer to skip re-configuration (similar to how setup_nearai checks for an existing session, or how setup_api_key_provider checks for an existing env var with "Use this key?"). Without this, every --provider-only wizard re-run on a Bedrock setup forces the user to re-select region, auth, and cross-region even when nothing has changed.

Suggested change

	return self.setup_bedrock().await;
	// For Bedrock, keeping the current provider should not force re-running
	// the entire setup flow (region, auth, cross-region prefix). We simply
	// keep the existing configuration.
	print_info("Keeping existing AWS Bedrock configuration.");
	return Ok(());

[ilblackdragon]

Fixed in 1730bd9 — when user confirms "Keep current provider?" for Bedrock, we now early-return with "Keeping existing AWS Bedrock configuration" instead of re-running the full setup flow (region, auth, cross-region).

[Copilot]

When auth choice 1 (named profile) is selected but the user enters an empty string, self.settings.bedrock_profile is left unchanged. If a profile was previously configured, it will remain set and be written to .env as AWS_PROFILE by write_bootstrap_env. The user has no way to clear a previously configured profile by pressing Enter here. The empty-profile case should either return an error (requiring a non-empty profile name when "named profile" is selected) or clear the existing profile, consistent with what auth choice 0 does.

Suggested change

	if !profile.is_empty() {
	if profile.trim().is_empty() {
	// Empty input clears any previously configured profile
	self.settings.bedrock_profile = None;
	print_info(
	"AWS profile cleared; using default AWS credential chain instead.",
	);
	} else {

[ilblackdragon]

Fixed in 1730bd9 — empty profile input now clears bedrock_profile and informs the user ("AWS profile cleared; using default AWS credential chain instead"). Added regression test test_bedrock_empty_profile_clears_existing.