v0.33.1: fix hot reload re-registration, add !hello, comprehensive docs

- Fixed hot reload: after TLS session restore, the bot now does a fresh
  IRC connection and re-sends PASS/NICK/USER to re-register with the
  server, fixing the issue where channels were never re-joined after
  !reload or !restart.
- Removed ZYNK_RESTORE_FD env var approach; reload_try_restore now
  restores settings and returns 1 to trigger a fresh connect.
- Added !hello command for casual greeting.
- Added atomic build rule in Makefile (compile to .tmp, then mv).
- Added comprehensive function-level documentation across the entire
  codebase (~80 new doc comments).

AGENTS.md

@@ -75,6 +75,7 @@ zynk/
 | `zynk <key>` | Look up a stored value |
 | `zynk <key> = <value>` | Store a value |
 | `!ping` | Responds with pong |
+| `!hello` | Responds with hello and the user's name |
 | `!weather [city]` | Current weather (default: Berlin) |
 | `!forecast [city]` | 3-day forecast |
 | `!ai <question>` | Ask the AI a question |

CHANGELOG.md

@@ -1,3 +1,19 @@
+2026.07.19 – Hot reload re-registration fix.
+
+- Fixed hot reload: after TLS session restore, the bot now re-sends PASS/NICK/USER to re-register with the IRC server, fixing the issue where channels were never re-joined after `!reload` or `!restart`.
+- Version bumped to 0.33.1.
+
+2026.07.19 – Hot reload, stock quotes, and auto-recompile.
+
+- Added hot reload: `!reload` and `!restart` commands (ops) save TLS session state, fork a new process with the inherited socket, and resume without dropping from IRC.
+- Added `!stock <SYMBOL>[,SYMBOL...]` command to fetch real-time stock quotes from Yahoo Finance (up to 3 symbols).
+- Added auto-compile and restart on `!code` changes: when the AI code change response is received, the bot runs `make` and reloads on success.
+- Added User-Agent header to curl requests to avoid being blocked by servers that reject the default curl agent.
+- Increased curl read buffer from 2 KiB to 32 KiB to handle larger API responses.
+- Improved `!forecast` JSON parsing: returns a descriptive error message on parse failure instead of silently returning nothing.
+- Increased AI_TIMEOUT from 240s to 600s and AI_REPLY_MAX from 400 to 2048 chars for longer AI interactions.
+- Version bumped to 0.33.0.
+
 2026.07.16 – Security hardening.
 
 - Fixed buffer overflow in ai_child_task: plen unsigned underflow when history entries exceed prefix buffer size, causing out-of-bounds writes via snprintf.

Makefile

@@ -16,6 +16,10 @@ endif
 
 all: zynk
 
+zynk: zynk.c
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@.tmp $< $(LDLIBS)
+	mv -f $@.tmp $@
+
 calc: zynk.c
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LDLIBS)
 
@@ -28,4 +32,3 @@ install: calc
 
 uninstall:
 	rm -vf $(DESTDIR)$(BINDIR)/zynk
-