feat: introduce runner protocol and normalized event model (#7)

changelog.md

@@ -1,16 +1,43 @@
 # changelog
 
+## v0.2.0 (2025-12-31)
+
+### changes
+
+- introduce runner protocol for multi-engine support #8
+  - normalized event model (`started`, `action`, `completed`)
+  - actions with stable ids, lifecycle phases, and structured details
+  - engine-agnostic bridge and renderer
+- add `/cancel` command with progress message targeting #4
+- migrate async runtime from asyncio to anyio #6
+- stream runner events via async iterators (natural backpressure)
+- per-thread job queues with serialization for same-thread runs
+- emit `completed` as terminal event (carries resume + final answer)
+- render resume as `` `codex resume <token>` `` command lines
+
+### breaking
+
+- require python 3.14+
+- remove `--profile` flag; configure via `[codex].profile` only
+
+### fixes
+
+- serialize new sessions once resume token is known
+- preserve resume tokens in error renders #3
+- preserve file-change paths in action events #2
+- terminate codex process groups on cancel (POSIX)
+- correct resume command matching in bridge
+
 ## v0.1.0 (2025-12-29)
 
-initial release.
-
 ### features
 
-- telegram bot bridge for openai codex cli using `codex exec` and `codex exec resume`
-- stateless session resume via `resume: <uuid>` lines embedded in messages
-- real-time progress updates with ~2s throttling, showing commands, tools, and elapsed time
-- full markdown rendering with telegram entity support (via markdown-it-py + sulguk)
-- concurrent message handling with per-session serialization to prevent race conditions
-- automatic telegram token redaction in logs
+- telegram bot bridge for openai codex cli via `codex exec`
+- stateless session resume via `` `codex resume <token>` `` lines
+- real-time progress updates with ~2s throttling
+- full markdown rendering with telegram entities (markdown-it-py + sulguk)
+- per-session serialization to prevent race conditions
 - interactive onboarding guide for first-time setup
-- cli options: `--profile`, `--debug`, `--final-notify`, `--version`
+- codex profile configuration
+- automatic telegram token redaction in logs
+- cli options: `--debug`, `--final-notify`, `--version`