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AGENTS.md

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+See [CLAUDE.md](./CLAUDE.md) for agent instructions for this project.

CLAUDE.md

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+# errbit-ruby
+
+A dependency-free Ruby client for reporting exceptions to an Errbit server.
+Plain Ruby — no Rails, no Rack. Targets Ruby >= 4.0.
+
+## Design constraints (do not violate without asking)
+
+- **Zero runtime dependencies.** The gem may only use Ruby's standard
+  library (`net/http`, `json`, `uri`, ...) at runtime. `rspec`, `webmock`,
+  `rubocop`, `rake`, `irb` are development-only (`add_development_dependency`
+  in `errbit-ruby.gemspec`, or plain `gem` lines in the `Gemfile`).
+- **No Rails, no Rack.** Nothing in `lib/` may assume either is loaded.
+- **This is a new, custom API** — not Airbrake- or Sentry-compatible. The
+  wire format is defined in `openapi/errbit-api.yaml` and that file is the
+  source of truth for the request/response shape the client builds and
+  parses. If you change the payload shape in `lib/errbit/error_report.rb`
+  or `lib/errbit/client.rb`, update the OpenAPI spec to match (and vice
+  versa).
+- **Synchronous delivery only.** `Errbit::Client#notify` makes a blocking
+  `Net::HTTP` call on the caller's thread. No background thread/queue.
+- Target Ruby version is 4.0 (`.ruby-version` pins the local dev version to
+  4.0.7 via rbenv; `required_ruby_version` in the gemspec is `>= 4.0`).
+
+## Project layout
+
+- `lib/errbit.rb` — public entry point: `Errbit.configure`, `Errbit.notify`.
+- `lib/errbit/configuration.rb` — `host`, `project_id`, `api_key`, `ignore`
+  list, timeouts.
+- `lib/errbit/backtrace.rb` — parses `exception.backtrace` lines into
+  `{file:, line:, method:}` hashes. Handles both the pre-3.4 backtick/quote
+  format and the 3.4+ single-quote format.
+- `lib/errbit/error_report.rb` — builds the JSON payload from an
+  `Exception`, matching the `ErrorReport` schema in the OpenAPI spec.
+- `lib/errbit/client.rb` — POSTs to
+  `{host}/api/v1/projects/{project_id}/errors/{api_key}` via `Net::HTTP`,
+  returns an `Errbit::Result`.
+- `lib/errbit/result.rb` — outcome object: `success?` / `ignored?` /
+  `failure?`.
+- `lib/errbit/errors.rb` — `Errbit::Error`, `ConfigurationError`,
+  `DeliveryError` (raised only on network failure, never on a well-formed
+  4xx/5xx from the server — those come back as a failed `Result`).
+- `openapi/errbit-api.yaml` — OpenAPI 3.1 spec for the single ingestion
+  endpoint this gem calls. Update alongside any payload/response change.
+
+## Commands
+
+```sh
+bundle install
+bundle exec rspec          # run the test suite (spec/)
+bundle exec rubocop        # lint
+bundle exec rake           # defaults to spec
+bin/console                # IRB session with Errbit pre-configured
+```
+
+Note: a `rubocop --server` daemon can get stuck/orphaned on this machine
+and hang `bundle exec rubocop`. If it hangs, check `ps aux | grep rubocop`
+and confirm with the user before killing anything; `--no-server` may not
+help if the daemon itself is wedged.
+
+## Testing conventions
+
+- RSpec, with WebMock stubbing all HTTP (`WebMock.disable_net_connect!` in
+  `spec/spec_helper.rb` — real network calls in specs are a bug, not a
+  feature).
+- WebMock's `hash_including` body matchers compare against the
+  **JSON-decoded body with string keys**, not symbols — write
+  `hash_including("error" => hash_including("class" => ...))`, not
+  `hash_including(error: hash_including(class: ...))`. Getting this wrong
+  is a common mistake here and fails silently-looking WebMock diffs.
+- Every spec file lives under `spec/`, mirroring `lib/errbit/*` files
+  1:1 (`lib/errbit/client.rb` <-> `spec/errbit/client_spec.rb`).
+
+## Style
+
+- `# frozen_string_literal: true` at the top of every Ruby file.
+- Double-quoted string literals (enforced by `.rubocop.yml`).
+- No comments explaining *what* code does; only *why*, when non-obvious
+  (see the `DeliveryError` note above for an example of the kind of thing
+  worth a comment).