style(no-slop): remove every em-dash + banned words across all modules + capstone

Apply the no-ai-slop standard (now binding in AGENTS.md): the em-dash character is
banned outright (restructured, not blind-replaced), plus the banned word/phrase
list (delve, leverage, robust, seamless, truly, unlock, etc.). 0 em-dashes remain
in modules + capstone; the only "robust" left is the planted M10 ai-change.patch
trap. Module H1 titles use a colon separator.

All deliberate teaching devices preserved; labs compile/parse (py/sh/yaml/json);
no junk. AGENTS.md updated with the hard no-slop rules.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TfzV5QvtPDz8LJS3Pu5VLT

modules/10-reviewing-code-you-didnt-write/lab/ai-diff-review-checklist.md

@@ -1,4 +1,4 @@
-# Reviewing an AI-generated diff — working checklist
+# Reviewing an AI-generated diff: working checklist
 
 Keep this open while you read a diff the AI produced. The point is not to re-read the whole
 file; it's to interrogate **the change** against the prompt you gave. Work top to bottom.
@@ -10,24 +10,24 @@ file; it's to interrogate **the change** against the prompt you gave. Work top t
 - [ ] **Read the diff, not the summary.** Ignore the AI's account of what it did; the diff is the
       only ground truth. (`git diff main..<branch>`)
 
-## 1. Scope — did it change only what was asked?
+## 1. Scope: did it change only what was asked?
 
 - [ ] Every hunk maps to the request. Anything outside it is **scope creep** until proven
       otherwise.
 - [ ] No unrelated files touched (formatting churn, import reshuffles, version bumps).
 - [ ] No "while I was here" refactors of code the request never mentioned.
 
-## 2. Deletions — what did it take away?
+## 2. Deletions: what did it take away?
 
 - [ ] Read every `-` line. Deletions are higher-risk than additions and skim right past you.
 - [ ] **Edge-case handling still there?** Bounds checks, `None`/empty guards, `try/except`,
-      validation, error returns — confirm none were dropped or weakened.
+      validation, error returns; confirm none were dropped or weakened.
 - [ ] An error that used to be raised/logged isn't now silently swallowed (`except: pass`).
 
-## 3. Plausibility — does it only *look* right?
+## 3. Plausibility: does it only *look* right?
 
 - [ ] **Invented APIs.** Every function, method, kwarg, attribute, import, env var, CLI flag,
-      config key, and endpoint actually exists. Confidence is not evidence — verify the
+      config key, and endpoint actually exists. Confidence is not evidence; verify the
       unfamiliar ones against real docs/source.
 - [ ] **Invented behavior.** It isn't relying on a flag/option that doesn't do what the name
       suggests (e.g. assuming `list.pop` takes a default like `dict.pop`).
@@ -35,7 +35,7 @@ file; it's to interrogate **the change** against the prompt you gave. Work top t
 - [ ] **Inverted or weakened conditions.** `if not x` vs `if x`, `<` vs `<=`, `and` vs `or`,
       a filter quietly dropped from a comprehension.
 
-## 4. Behavior change — would the happy path hide it?
+## 4. Behavior change: would the happy path hide it?
 
 - [ ] Does any existing command/function behave differently now? Trace one real call through.
 - [ ] **Run the failure case, not the success case.** The trap usually survives the happy
@@ -45,7 +45,7 @@ file; it's to interrogate **the change** against the prompt you gave. Work top t
 ## 5. Decide
 
 - [ ] I can explain, in my own words, what every hunk does and why it's correct.
-- [ ] If I can't, I **request changes** — the burden of proof is on the diff, not on me.
+- [ ] If I can't, I **request changes**; the burden of proof is on the diff, not on me.
 
 > Rule of thumb: a diff is guilty until proven correct. "It runs" is the weakest possible
 > evidence; "I read every `-` line and ran the failure case" is the bar.

modules/10-reviewing-code-you-didnt-write/lab/tasks-app/cli.py

@@ -6,7 +6,7 @@ Run it:
     python cli.py done 0
 
 State is kept in tasks.json next to this file. The `done` command turns a bad index into a
-clean error message and a non-zero exit code — note that behavior before you review the AI
+clean error message and a non-zero exit code; note that behavior before you review the AI
 change, so you can tell if the change quietly alters it.
 """
 

modules/10-reviewing-code-you-didnt-write/lab/tasks-app/tasks.py

@@ -2,7 +2,7 @@
 
 Same running example as Modules 1 and 2, with one addition: `complete` now validates the
 index and raises a clear error for a bad one. That explicit edge-case handling is here on
-purpose — it's the kind of thing an AI "refactor" likes to quietly remove. This is the
+purpose; it's the kind of thing an AI "refactor" likes to quietly remove. This is the
 known-good base you'll review an AI change against in Module 10.
 """