feat: implement Phase 4 (Filters) and Phase 5 (AI Auth & Provider System)

[utkarsh232005]

This PR implements K8sGPT-style filter management (Phase 4) and AI provider management (Phase 5) along with unit tests. Fully compliant with coding_style.md guidelines.

Summary by CodeRabbit

Release Notes

• New Features

  • Added auth command to manage AI providers: add, update, list, set default, and remove providers
  • Support for multiple AI backends: OpenAI, Anthropic, Ollama, and custom REST endpoints
  • Added filters command to manage analyzer filters: list, add, and remove
  • Custom headers and configurable parameters for AI providers

• Tests

  • Comprehensive test coverage for auth and filters commands and AI client implementations

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ℹ️ Review info

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📥 Commits

Reviewing files that changed from the base of the PR and between b644c82 and cd64242.

📒 Files selected for processing (4)

• src/__tests__/auth.test.ts
• src/ai/anthropic.ts
• src/ai/openai.ts
• src/commands/auth.ts

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⚠️ Parsing warnings (1)

Validation error: Unrecognized key: "pre_merge_checks"

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📝 Walkthrough

Walkthrough

This PR introduces a pluggable AI client system with four production backends (OpenAI, Anthropic, Ollama, CustomRest), a test stub (Noop), and CLI commands to manage provider credentials and analyzer filters. The factory pattern enables runtime backend selection from stored configuration.

Changes

AI Provider Management and Filter CLI Commands

Layer / File(s)	Summary
AI Client Interface src/ai/types.ts	Standardized AIClient interface with configure, getCompletion, and optional close methods.
AI Client Implementations src/ai/noop.ts, src/ai/anthropic.ts, src/ai/custom-rest.ts, src/ai/ollama.ts, src/ai/openai.ts	Five AI client implementations with backend-specific request formatting, header handling, and response parsing. AnthropicAIClient validates API key presence; CustomRestAIClient supports arbitrary endpoints; OpenAI and Ollama apply URL normalization and default model/base-url values.
AI Client Factory src/ai/factory.ts	createAIClient(backendName) maps backend names to client classes, loads provider config, instantiates and configures the client, and returns a ready-to-use instance.
Auth Command src/commands/auth.ts	CLI subcommands for provider management: auth add (with defaults for model and numeric fields), auth update (per-field modification), auth list (with secret masking), auth default, auth remove (with default provider reassignment).
Filters Command src/commands/filters.ts	CLI subcommands for analyzer filters: filters list (shows active and available-but-inactive), filters add (with duplicate detection), filters remove (handles explicit and default-set removals).
Root CLI Integration src/commands/root.ts	Registers auth and filters commands alongside existing show/health/watch/logs/config/analyze commands.
Auth and AI Client Tests src/__tests__/auth.test.ts	Mocks config store and fetch; tests provider add/update/list/default/remove, parameterized client request wiring across four backends with URL/header/body assertions, error handling for missing required fields and unsupported backends, and HTTP error responses.
Filters Command Tests src/__tests__/filters.test.ts	Mocks filter store; tests list (empty and populated), add (valid/duplicate/invalid), remove (active/inactive/from-defaults/invalid), with exit-code and console-output assertions.

Sequence Diagram(s)

sequenceDiagram
  participant User as User
  participant CLI as Auth CLI
  participant Store as Config Store
  participant Factory as Factory
  participant Client as AIClient
  participant HTTP as HTTP Endpoint
  
  User->>CLI: auth add openai
  CLI->>Store: getAIConfig()
  Store-->>CLI: current config
  CLI->>CLI: validate backend
  CLI->>Store: setAIConfig(provider added)
  Store-->>CLI: persisted
  CLI-->>User: "Added openai provider"
  
  User->>CLI: some-command-that-needs-ai
  CLI->>Factory: createAIClient('openai')
  Factory->>Store: getAIConfig()
  Factory->>Client: new OpenAIAIClient()
  Factory->>Client: configure(providerConfig)
  Client-->>Factory: configured
  Factory-->>CLI: AIClient instance
  CLI->>Client: getCompletion(prompt)
  Client->>HTTP: POST /chat/completions
  HTTP-->>Client: response with choices
  Client-->>CLI: "completion text"

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Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Suggested labels

version2

Poem

🤖 Four backends now dance in harmony,
Ollama, OpenAI, Anthropic, REST—
A pluggable symphony of completion,
Masking secrets while users request,
CLI commands filter and configure with grace. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main changes: implementing filter management (Phase 4) and AI provider/auth system (Phase 5), matching the substantial additions across test files, commands, and AI client implementations.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

❌ Patch coverage is 92.41877% with 21 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/commands/auth.ts	88.18%	0 Missing and 15 partials ⚠️
src/ai/anthropic.ts	92.00%	0 Missing and 2 partials ⚠️
src/ai/openai.ts	92.30%	0 Missing and 2 partials ⚠️
src/ai/custom-rest.ts	94.44%	0 Missing and 1 partial ⚠️
src/ai/ollama.ts	94.11%	0 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[codescene-delta-analysis]

Gates Passed
3 Quality Gates Passed

See analysis details in CodeScene

Quality Gate Profile: The Bare Minimum
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