docs(workflows): address CodeRabbit markdownlint and wording findings

get-shit-done/workflows/code-review-fix.md

@@ -188,7 +188,7 @@ echo "Fix scope: ${FIX_SCOPE}"
 
 Use Agent() to spawn agent:
 
-```
+```text
 Agent(subagent_type="gsd-code-fixer", prompt="
 <files_to_read>
 ${REVIEW_PATH}

get-shit-done/workflows/execute-phase.md

@@ -480,7 +480,7 @@ increases monotonically across waves. `{status}` is `complete` (success),
    creation before the next begins (the round-trip latency of each tool call provides
    natural spacing), while all agents still **run in parallel** once created.
 
-   ```
+   ```text
    # CORRECT: dispatch one Agent() per message, each with run_in_background: true
    # → worktrees created sequentially, agents execute in parallel
    #
@@ -488,7 +488,7 @@ increases monotonically across waves. `{status}` is `complete` (success),
    # → simultaneous git worktree add → .git/config.lock contention → failures
    ```
 
-   ```
+   ```text
    Agent(
      subagent_type="gsd-executor",
      description="Execute plan {plan_number} of phase {phase_number}",

get-shit-done/workflows/new-milestone.md

@@ -340,7 +340,7 @@ Use template: ~/.claude/get-shit-done/templates/research-project/{FILE}
 
 After all 4 complete, spawn synthesizer:
 
-```
+```text
 Agent(prompt="
 Synthesize research outputs into SUMMARY.md.
 

get-shit-done/workflows/new-project.md

@@ -920,7 +920,7 @@ Use template: ~/.claude/get-shit-done/templates/research-project/PITFALLS.md
 
 After all 4 agents complete, spawn synthesizer to create SUMMARY.md:
 
-```
+```text
 Agent(prompt="
 <task>
 Synthesize research outputs into SUMMARY.md.

get-shit-done/workflows/plan-phase.md

@@ -866,9 +866,9 @@ Every task MUST include these fields — they are NOT optional:
 </quality_gate>
 ```
 
-**If `CHUNKED_MODE` is `false` (default):** Spawn the planner as a single long-lived Task:
+**If `CHUNKED_MODE` is `false` (default):** Spawn the planner as a single long-lived Agent:
 
-```
+```text
 Agent(
   prompt=filled_prompt,
   subagent_type="gsd-planner",
@@ -885,9 +885,9 @@ Agent(
 
 **Skip if `CHUNKED_MODE` is `false`.**
 
-Chunked mode splits the single long-lived planner Task into a short outline Task followed by
-N short per-plan Tasks. Each Task is bounded to ~3–5 min; each plan is committed individually
-for crash resilience. If any Task hangs and the terminal is force-killed, rerunning
+Chunked mode splits the single long-lived planner Agent run into a short outline Agent run followed by
+N short per-plan Agent runs. Each run is bounded to ~3–5 min; each plan is committed individually
+for crash resilience. If any run hangs and the terminal is force-killed, rerunning
 `/gsd-plan-phase {N} --chunked` resumes from the last successfully committed plan.
 
 **Intended for new or in-progress chunked runs.** To recover plans already written by a prior