diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index f289317..9733e8d 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -44,6 +44,12 @@
       },
       "description": "CI/CD, deployment, issue tracking, and Coolify integration",
       "version": "0.1.0"
+    },
+    {
+      "name": "devops",
+      "source": "./claude/devops",
+      "description": "Agent workflow utilities — install binaries, merge workspaces, update deps, clean queues",
+      "version": "0.1.0"
     }
   ]
 }
diff --git a/claude/devops/.claude-plugin/plugin.json b/claude/devops/.claude-plugin/plugin.json
new file mode 100644
index 0000000..91a09f8
--- /dev/null
+++ b/claude/devops/.claude-plugin/plugin.json
@@ -0,0 +1,9 @@
+{
+  "name": "devops",
+  "version": "0.1.0",
+  "description": "DevOps utilities for the Core ecosystem — build, install, deploy.",
+  "author": {
+    "name": "Lethean",
+    "email": "virgil@lethean.io"
+  }
+}
diff --git a/claude/devops/skills/clean-workspaces/SKILL.md b/claude/devops/skills/clean-workspaces/SKILL.md
new file mode 100644
index 0000000..64e2073
--- /dev/null
+++ b/claude/devops/skills/clean-workspaces/SKILL.md
@@ -0,0 +1,44 @@
+---
+name: clean-workspaces
+description: This skill should be used when the user asks to "clean workspaces", "clean up old agents", "remove stale workspaces", "nuke completed workspaces", or needs to remove finished/failed agent workspaces from the dispatch queue.
+argument-hint: [--all | --completed | --failed | --blocked]
+allowed-tools: ["Bash"]
+---
+
+# Clean Agent Workspaces
+
+Remove stale agent workspaces from the dispatch system.
+
+## Steps
+
+1. List all workspaces with their status:
+   ```bash
+   for ws in /Users/snider/Code/.core/workspace/*/status.json; do
+     dir=$(dirname "$ws")
+     name=$(basename "$dir")
+     status=$(python3 -c "import json; print(json.load(open('$ws'))['status'])" 2>/dev/null || echo "unknown")
+     echo "$status $name"
+   done | sort
+   ```
+
+2. Based on the argument:
+   - `--completed` — remove workspaces with status "completed"
+   - `--failed` — remove workspaces with status "failed"
+   - `--blocked` — remove workspaces with status "blocked"
+   - `--all` — remove completed + failed + blocked (NOT running)
+   - No argument — show the list and ask the user what to remove
+
+3. Show the user what will be removed and get confirmation BEFORE deleting.
+
+4. Remove confirmed workspaces:
+   ```bash
+   rm -rf /Users/snider/Code/.core/workspace/<name>/
+   ```
+
+5. Report how many were removed.
+
+## Important
+
+- NEVER remove workspaces with status "running" — they have active processes
+- ALWAYS ask for confirmation before removing
+- Show the count and names before removing
diff --git a/claude/devops/skills/install-core-agent/SKILL.md b/claude/devops/skills/install-core-agent/SKILL.md
new file mode 100644
index 0000000..53205c5
--- /dev/null
+++ b/claude/devops/skills/install-core-agent/SKILL.md
@@ -0,0 +1,35 @@
+---
+name: install-core-agent
+description: This skill should be used when the user asks to "install core-agent", "rebuild core-agent", "update the agent binary", or needs to compile and install the core-agent MCP server binary. Runs the correct go install from the right directory with the right path.
+argument-hint: (no arguments needed)
+allowed-tools: ["Bash"]
+---
+
+# Install core-agent
+
+Build and install the core-agent binary from source.
+
+## Steps
+
+1. Run from the core/agent repo directory:
+
+```bash
+cd /Users/snider/Code/core/agent && go install ./cmd/core-agent/
+```
+
+2. Verify the binary is installed:
+
+```bash
+which core-agent
+```
+
+3. Tell the user to restart core-agent (it runs as an MCP server — the process needs restarting to pick up the new binary).
+
+## Important
+
+- The entry point is `./cmd/core-agent/main.go` — NOT `./cmd/` or `.`
+- `go install ./cmd/core-agent/` produces a binary named `core-agent` automatically
+- Do NOT use `go install .`, `go install ./cmd/`, or `go build` with manual `-o` flags
+- Do NOT move, copy, or rename binaries
+- Do NOT touch `~/go/bin/` or `~/.local/bin/` directly
+- If the install fails, report the error to the user — do not attempt alternatives
diff --git a/claude/devops/skills/merge-workspace/SKILL.md b/claude/devops/skills/merge-workspace/SKILL.md
new file mode 100644
index 0000000..f7c74c1
--- /dev/null
+++ b/claude/devops/skills/merge-workspace/SKILL.md
@@ -0,0 +1,56 @@
+---
+name: merge-workspace
+description: This skill should be used when the user asks to "merge workspace", "bring over the changes", "review and merge agent work", "pull in the agent's diff", or needs to take a completed agent workspace and merge its changes into the dev branch. Checks the diff, verifies the build, and applies changes.
+argument-hint: <workspace-name>
+allowed-tools: ["Bash", "Read"]
+---
+
+# Merge Agent Workspace
+
+Take a completed agent workspace and merge its changes into the repo's dev branch.
+
+## Steps
+
+1. Find the workspace. The argument is the workspace name (e.g., `agent-1774177216443021000`). The full path is:
+   ```
+   /Users/snider/Code/.core/workspace/<name>/
+   ```
+
+2. Check status:
+   ```bash
+   cat /Users/snider/Code/.core/workspace/<name>/status.json
+   ```
+   Only proceed if status is `completed` or `ready-for-review`.
+
+3. Show the diff from the workspace's src/ directory:
+   ```bash
+   cd /Users/snider/Code/.core/workspace/<name>/src && git diff HEAD
+   ```
+   Present a summary of what changed to the user.
+
+4. Ask the user if the changes look good before proceeding.
+
+5. Find the original repo path from status.json (`repo` field). The repo lives at:
+   ```
+   /Users/snider/Code/core/<repo>/
+   ```
+
+6. Cherry-pick or apply the changes. Use `git diff` to create a patch and apply it:
+   ```bash
+   cd /Users/snider/Code/.core/workspace/<name>/src && git diff HEAD > /tmp/agent-patch.diff
+   cd /Users/snider/Code/core/<repo>/ && git apply /tmp/agent-patch.diff
+   ```
+
+7. Verify the build passes:
+   ```bash
+   cd /Users/snider/Code/core/<repo>/ && go build ./...
+   ```
+
+8. Report results. Do NOT commit — let the user decide when to commit.
+
+## Important
+
+- Always show the diff BEFORE applying
+- Always verify the build AFTER applying
+- Never commit — the user commits when ready
+- If the patch fails to apply, show the conflict and stop
diff --git a/claude/devops/skills/repair-core-agent/SKILL.md b/claude/devops/skills/repair-core-agent/SKILL.md
new file mode 100644
index 0000000..458e40a
--- /dev/null
+++ b/claude/devops/skills/repair-core-agent/SKILL.md
@@ -0,0 +1,68 @@
+---
+name: repair-core-agent
+description: This skill should be used when core-agent is broken, MCP tools aren't responding, dispatch fails, the agent binary is stale, or the user says "fix core-agent", "repair the agent", "core-agent is broken", "MCP not working", "dispatch broken". Diagnoses and guides repair of the core-agent MCP server.
+argument-hint: (no arguments needed)
+allowed-tools: ["Bash", "Read"]
+---
+
+# Repair core-agent
+
+Diagnose and fix core-agent when it's broken.
+
+## Diagnosis Steps
+
+Run these in order, stop at the first failure:
+
+### 1. Is the binary installed?
+```bash
+which core-agent
+```
+Should be at `~/.local/bin/core-agent` or `~/go/bin/core-agent`. If BOTH exist, the wrong one might take precedence — check PATH order.
+
+### 2. Does it compile?
+```bash
+cd /Users/snider/Code/core/agent && go build ./cmd/core-agent/
+```
+If this fails, there's a code error. Report it and stop.
+
+### 3. Is a stale process running?
+```bash
+ps aux | grep core-agent | grep -v grep
+```
+If yes, the user needs to restart it to pick up the new binary.
+
+### 4. Can it start?
+```bash
+core-agent mcp 2>&1 | head -5
+```
+Should show subsystem loading messages.
+
+### 5. Are workspaces clean?
+```bash
+ls /Users/snider/Code/.core/workspace/ 2>/dev/null
+```
+Should only have `events.jsonl`. Stale workspaces with "running" status but dead PIDs cause phantom slot usage.
+
+### 6. Is agents.yaml readable?
+```bash
+cat /Users/snider/Code/.core/agents.yaml
+```
+Check concurrency settings, agent definitions.
+
+## Common Fixes
+
+| Symptom | Fix |
+|---------|-----|
+| Wrong binary running | Remove stale binary, user reinstalls |
+| MCP tools not found | Restart core-agent process |
+| Dispatch always queued | Check concurrency limits in agents.yaml |
+| Workspaces not prepping | Check workspace template: `ls pkg/lib/workspace/default/` |
+| go.work missing from workspace | Rebuild core-agent — template was updated |
+| Codex can't find core.Env | Core dep too old — run update-deps skill |
+
+## Important
+
+- Do NOT run `go install` — tell the user to do it
+- Do NOT kill processes without asking
+- Do NOT delete workspaces without asking
+- Report what's wrong, suggest the fix, let the user decide
diff --git a/claude/devops/skills/update-deps/SKILL.md b/claude/devops/skills/update-deps/SKILL.md
new file mode 100644
index 0000000..e2ea49c
--- /dev/null
+++ b/claude/devops/skills/update-deps/SKILL.md
@@ -0,0 +1,55 @@
+---
+name: update-deps
+description: This skill should be used when the user asks to "update deps", "bump core", "update go.mod", "upgrade dependencies", or needs to update dappco.re/go/core or other Go module dependencies in a core ecosystem repo. Uses go get properly — never manual go.mod editing.
+argument-hint: [repo-name] [module@version]
+allowed-tools: ["Bash"]
+---
+
+# Update Go Module Dependencies
+
+Properly update dependencies in a Core ecosystem Go module.
+
+## Steps
+
+1. Determine the repo. If an argument is given, use it. Otherwise use the current working directory.
+   ```
+   /Users/snider/Code/core/<repo>/
+   ```
+
+2. Check current dependency versions:
+   ```bash
+   grep 'dappco.re' go.mod
+   ```
+
+3. Update the dependency using `go get`. Examples:
+   ```bash
+   # Update core to latest
+   GONOSUMDB='dappco.re/*' GONOSUMCHECK='dappco.re/*' GOPROXY=direct go get dappco.re/go/core@latest
+
+   # Update to specific version
+   GONOSUMDB='dappco.re/*' GONOSUMCHECK='dappco.re/*' GOPROXY=direct go get dappco.re/go/core@v0.6.0
+
+   # Update all dappco.re deps
+   GONOSUMDB='dappco.re/*' GONOSUMCHECK='dappco.re/*' GOPROXY=direct go get -u dappco.re/...
+   ```
+
+4. Tidy:
+   ```bash
+   go mod tidy
+   ```
+
+5. Verify:
+   ```bash
+   go build ./...
+   ```
+
+6. Report what changed in go.mod.
+
+## Important
+
+- ALWAYS use `go get` — NEVER manually edit go.mod
+- ALWAYS set `GONOSUMDB` and `GONOSUMCHECK` for dappco.re modules
+- ALWAYS set `GOPROXY=direct` to bypass proxy cache for private modules
+- ALWAYS run `go mod tidy` after updating
+- ALWAYS verify with `go build ./...`
+- If a version doesn't resolve, check if the tag has been pushed to GitHub (dappco.re vanity imports resolve through GitHub)
diff --git a/cmd/core-agent/main.go b/cmd/core-agent/main.go
index f0d71e4..261d6e0 100644
--- a/cmd/core-agent/main.go
+++ b/cmd/core-agent/main.go
@@ -11,6 +11,7 @@ import (
 
 	"dappco.re/go/agent/pkg/agentic"
 	"dappco.re/go/agent/pkg/brain"
+	"dappco.re/go/agent/pkg/lib"
 	"dappco.re/go/agent/pkg/monitor"
 	"forge.lthn.ai/core/mcp/pkg/mcp"
 )
@@ -21,6 +22,108 @@ func main() {
 	})
 	c.App().Version = "0.2.0"
 
+	// version — print version and build info
+	c.Command("version", core.Command{
+		Description: "Print version and build info",
+		Action: func(opts core.Options) core.Result {
+			core.Print(nil, "core-agent %s", c.App().Version)
+			core.Print(nil, "  go:       %s", core.Env("GO"))
+			core.Print(nil, "  os:       %s/%s", core.Env("OS"), core.Env("ARCH"))
+			core.Print(nil, "  home:     %s", core.Env("DIR_HOME"))
+			core.Print(nil, "  hostname: %s", core.Env("HOSTNAME"))
+			core.Print(nil, "  pid:      %s", core.Env("PID"))
+			return core.Result{OK: true}
+		},
+	})
+
+	// check — verify workspace, deps, and config are healthy
+	c.Command("check", core.Command{
+		Description: "Verify workspace, deps, and config",
+		Action: func(opts core.Options) core.Result {
+			fs := c.Fs()
+
+			core.Print(nil, "core-agent %s health check", c.App().Version)
+			core.Print(nil, "")
+
+			// Binary location
+			core.Print(nil, "  binary:    %s", os.Args[0])
+
+			// Agents config
+			agentsPath := core.Path("Code", ".core", "agents.yaml")
+			if fs.IsFile(agentsPath) {
+				core.Print(nil, "  agents:    %s (ok)", agentsPath)
+			} else {
+				core.Print(nil, "  agents:    %s (MISSING)", agentsPath)
+			}
+
+			// Workspace dir
+			wsRoot := core.Path("Code", ".core", "workspace")
+			if fs.IsDir(wsRoot) {
+				r := fs.List(wsRoot)
+				count := 0
+				if r.OK {
+					count = len(r.Value.([]os.DirEntry))
+				}
+				core.Print(nil, "  workspace: %s (%d entries)", wsRoot, count)
+			} else {
+				core.Print(nil, "  workspace: %s (MISSING)", wsRoot)
+			}
+
+			// Core dep version
+			core.Print(nil, "  core:      dappco.re/go/core@v%s", c.App().Version)
+
+			// Env keys
+			core.Print(nil, "  env keys:  %d loaded", len(core.EnvKeys()))
+
+			core.Print(nil, "")
+			core.Print(nil, "ok")
+			return core.Result{OK: true}
+		},
+	})
+
+	// extract — test workspace template extraction
+	c.Command("extract", core.Command{
+		Description: "Extract a workspace template to a directory",
+		Action: func(opts core.Options) core.Result {
+			tmpl := opts.String("_arg")
+			if tmpl == "" {
+				tmpl = "default"
+			}
+			target := opts.String("target")
+			if target == "" {
+				target = core.Path("Code", ".core", "workspace", "test-extract")
+			}
+
+			data := &lib.WorkspaceData{
+				Repo:   "test-repo",
+				Branch: "dev",
+				Task:   "test extraction",
+				Agent:  "codex",
+			}
+
+			core.Print(nil, "extracting template %q to %s", tmpl, target)
+			if err := lib.ExtractWorkspace(tmpl, target, data); err != nil {
+				return core.Result{Value: err, OK: false}
+			}
+
+			// List what was created
+			fs := &core.Fs{}
+			r := fs.List(target)
+			if r.OK {
+				for _, e := range r.Value.([]os.DirEntry) {
+					marker := " "
+					if e.IsDir() {
+						marker = "/"
+					}
+					core.Print(nil, "  %s%s", e.Name(), marker)
+				}
+			}
+
+			core.Print(nil, "done")
+			return core.Result{OK: true}
+		},
+	})
+
 	// Shared setup — creates MCP service with all subsystems wired
 	initServices := func() (*mcp.Service, *monitor.Subsystem, error) {
 		procFactory := process.NewService(process.Options{})
@@ -76,18 +179,17 @@ func main() {
 				return core.Result{Value: err, OK: false}
 			}
 
-			addr := os.Getenv("MCP_HTTP_ADDR")
+			addr := core.Env("MCP_HTTP_ADDR")
 			if addr == "" {
 				addr = "0.0.0.0:9101"
 			}
 
-			healthAddr := os.Getenv("HEALTH_ADDR")
+			healthAddr := core.Env("HEALTH_ADDR")
 			if healthAddr == "" {
 				healthAddr = "0.0.0.0:9102"
 			}
 
-			home, _ := os.UserHomeDir()
-			pidFile := core.Concat(home, "/.core/core-agent.pid")
+			pidFile := core.Path(".core", "core-agent.pid")
 
 			daemon := process.NewDaemon(process.DaemonOptions{
 				PIDFile:    pidFile,
diff --git a/pkg/agentic/dispatch.go b/pkg/agentic/dispatch.go
index 5ff978d..5429cdb 100644
--- a/pkg/agentic/dispatch.go
+++ b/pkg/agentic/dispatch.go
@@ -68,11 +68,24 @@ func agentCommand(agent, prompt string) (string, []string, error) {
 	case "codex":
 		if model == "review" {
 			// Codex review mode — non-interactive code review
-			// Note: --base and prompt are mutually exclusive in codex CLI
-			return "codex", []string{"review", "--base", "HEAD~1"}, nil
+			return "codex", []string{
+				"review", "--base", "HEAD~1",
+			}, nil
 		}
-		// Codex agent mode — autonomous coding
-		return "codex", []string{"exec", "--full-auto", prompt}, nil
+		// Codex agent mode — workspace root is not a git repo (src/ is),
+		// so --skip-git-repo-check is required. --full-auto gives
+		// workspace-write sandbox with on-request approval.
+		args := []string{
+			"exec",
+			"--full-auto",
+			"--skip-git-repo-check",
+			"-o", "agent-codex.log",
+			prompt,
+		}
+		if model != "" {
+			args = append(args[:3], append([]string{"--model", model}, args[3:]...)...)
+		}
+		return "codex", args, nil
 	case "claude":
 		args := []string{
 			"-p", prompt,
@@ -127,7 +140,7 @@ func (s *PrepSubsystem) spawnAgent(agent, prompt, wsDir, srcDir string) (int, st
 	proc, err := process.StartWithOptions(context.Background(), process.RunOptions{
 		Command: command,
 		Args:    args,
-		Dir:     srcDir,
+		Dir:     wsDir,
 		Env:     []string{"TERM=dumb", "NO_COLOR=1", "CI=true", "GOWORK=off"},
 		Detach:  true,
 	})
diff --git a/pkg/agentic/mirror.go b/pkg/agentic/mirror.go
index 5723389..2da4c7b 100644
--- a/pkg/agentic/mirror.go
+++ b/pkg/agentic/mirror.go
@@ -4,9 +4,9 @@ package agentic
 
 import (
 	"context"
+	"encoding/json"
 	"os"
 	"os/exec"
-	"strings"
 
 	core "dappco.re/go/core"
 	"github.com/modelcontextprotocol/go-sdk/mcp"
@@ -265,16 +265,24 @@ func (s *PrepSubsystem) listLocalRepos(basePath string) []string {
 
 // extractJSONField extracts a simple string field from JSON array output.
 func extractJSONField(jsonStr, field string) string {
-	// Quick and dirty — works for gh CLI output like [{"url":"https://..."}]
-	key := core.Sprintf(`"%s":"`, field)
-	idx := strings.Index(jsonStr, key)
-	if idx < 0 {
+	if jsonStr == "" || field == "" {
 		return ""
 	}
-	start := idx + len(key)
-	end := strings.Index(jsonStr[start:], `"`)
-	if end < 0 {
+
+	var list []map[string]any
+	if err := json.Unmarshal([]byte(jsonStr), &list); err == nil {
+		for _, item := range list {
+			if value, ok := item[field].(string); ok {
+				return value
+			}
+		}
+	}
+
+	var item map[string]any
+	if err := json.Unmarshal([]byte(jsonStr), &item); err != nil {
 		return ""
 	}
-	return jsonStr[start : start+end]
+
+	value, _ := item[field].(string)
+	return value
 }
diff --git a/pkg/agentic/paths_test.go b/pkg/agentic/paths_test.go
index 4735d5b..1bf8216 100644
--- a/pkg/agentic/paths_test.go
+++ b/pkg/agentic/paths_test.go
@@ -111,6 +111,16 @@ func TestExtractJSONField_Good(t *testing.T) {
 	assert.Equal(t, "https://github.com/dAppCore/go-io/pull/1", extractJSONField(json, "url"))
 }
 
+func TestExtractJSONField_Good_Object(t *testing.T) {
+	json := `{"url":"https://github.com/dAppCore/go-io/pull/2"}`
+	assert.Equal(t, "https://github.com/dAppCore/go-io/pull/2", extractJSONField(json, "url"))
+}
+
+func TestExtractJSONField_Good_PrettyPrinted(t *testing.T) {
+	json := "[\n  {\n    \"url\": \"https://github.com/dAppCore/go-io/pull/3\"\n  }\n]"
+	assert.Equal(t, "https://github.com/dAppCore/go-io/pull/3", extractJSONField(json, "url"))
+}
+
 func TestExtractJSONField_Bad_Missing(t *testing.T) {
 	assert.Equal(t, "", extractJSONField(`{"name":"test"}`, "url"))
 	assert.Equal(t, "", extractJSONField("", "url"))
diff --git a/pkg/agentic/plan.go b/pkg/agentic/plan.go
index 31bf276..f3931b5 100644
--- a/pkg/agentic/plan.go
+++ b/pkg/agentic/plan.go
@@ -8,7 +8,6 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"os"
-	"strings"
 	"time"
 
 	core "dappco.re/go/core"
@@ -348,28 +347,7 @@ func planPath(dir, id string) string {
 }
 
 func generatePlanID(title string) string {
-	slug := strings.Map(func(r rune) rune {
-		if r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || r == '-' {
-			return r
-		}
-		if r >= 'A' && r <= 'Z' {
-			return r + 32
-		}
-		if r == ' ' {
-			return '-'
-		}
-		return -1
-	}, title)
-
-	// Trim consecutive dashes and cap length
-	for core.Contains(slug, "--") {
-		slug = core.Replace(slug, "--", "-")
-	}
-	slug = strings.Trim(slug, "-")
-	if len(slug) > 30 {
-		slug = slug[:30]
-	}
-	slug = strings.TrimRight(slug, "-")
+	slug := sanitisePlanSlug(title)
 
 	// Append short random suffix for uniqueness
 	b := make([]byte, 3)
diff --git a/pkg/agentic/prep.go b/pkg/agentic/prep.go
index 9de94ad..13f99a5 100644
--- a/pkg/agentic/prep.go
+++ b/pkg/agentic/prep.go
@@ -11,7 +11,6 @@ import (
 	goio "io"
 	"net/http"
 	"os/exec"
-	"strings"
 	"sync"
 	"time"
 
@@ -204,19 +203,7 @@ func (s *PrepSubsystem) prepWorkspace(ctx context.Context, _ *mcp.CallToolReques
 	}
 
 	// Create feature branch
-	taskSlug := strings.Map(func(r rune) rune {
-		if r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || r == '-' {
-			return r
-		}
-		if r >= 'A' && r <= 'Z' {
-			return r + 32 // lowercase
-		}
-		return '-'
-	}, input.Task)
-	if len(taskSlug) > 40 {
-		taskSlug = taskSlug[:40]
-	}
-	taskSlug = strings.Trim(taskSlug, "-")
+	taskSlug := sanitiseBranchSlug(input.Task, 40)
 	if taskSlug == "" {
 		// Fallback for issue-only dispatches with no task text
 		taskSlug = core.Sprintf("issue-%d", input.Issue)
@@ -234,17 +221,17 @@ func (s *PrepSubsystem) prepWorkspace(ctx context.Context, _ *mcp.CallToolReques
 	out.Branch = branchName
 
 	// Create context dirs inside src/
-	fs.EnsureDir(core.JoinPath(srcDir, "kb"))
-	fs.EnsureDir(core.JoinPath(srcDir, "specs"))
+	fs.EnsureDir(core.JoinPath(wsDir, "kb"))
+	fs.EnsureDir(core.JoinPath(wsDir, "specs"))
 
 	// Remote stays as local clone origin — agent cannot push to forge.
 	// Reviewer pulls changes from workspace and pushes after verification.
 
-	// 2. Extract workspace template
-	wsTmpl := "default"
+	// 2. Extract workspace template — default first, then overlay
+	wsTmpl := ""
 	if input.Template == "security" {
 		wsTmpl = "security"
-	} else if input.Template == "verify" || input.Template == "conventions" {
+	} else if input.Template == "review" || input.Template == "verify" || input.Template == "conventions" {
 		wsTmpl = "review"
 	}
 
@@ -276,18 +263,9 @@ func (s *PrepSubsystem) prepWorkspace(ctx context.Context, _ *mcp.CallToolReques
 		TestCmd:  detectTestCmd(repoPath),
 	}
 
-	lib.ExtractWorkspace(wsTmpl, srcDir, wsData)
-	out.ClaudeMd = true
-
-	// Copy repo's own CLAUDE.md over template if it exists
-	claudeMdPath := core.JoinPath(repoPath, "CLAUDE.md")
-	if r := fs.Read(claudeMdPath); r.OK {
-		fs.Write(core.JoinPath(srcDir, "CLAUDE.md"), r.Value.(string))
-	}
-	// Copy GEMINI.md from core/agent (ethics framework for all agents)
-	agentGeminiMd := core.JoinPath(s.codePath, "core", "agent", "GEMINI.md")
-	if r := fs.Read(agentGeminiMd); r.OK {
-		fs.Write(core.JoinPath(srcDir, "GEMINI.md"), r.Value.(string))
+	lib.ExtractWorkspace("default", wsDir, wsData)
+	if wsTmpl != "" {
+		lib.ExtractWorkspace(wsTmpl, wsDir, wsData)
 	}
 
 	// 3. Generate TODO.md from issue (overrides template)
@@ -469,12 +447,7 @@ func (s *PrepSubsystem) pullWiki(ctx context.Context, org, repo, wsDir string) i
 		}
 
 		content, _ := base64.StdEncoding.DecodeString(pageData.ContentBase64)
-		filename := strings.Map(func(r rune) rune {
-			if r >= 'a' && r <= 'z' || r >= 'A' && r <= 'Z' || r >= '0' && r <= '9' || r == '-' || r == '_' || r == '.' {
-				return r
-			}
-			return '-'
-		}, page.Title) + ".md"
+		filename := sanitiseFilename(page.Title) + ".md"
 
 		fs.Write(core.JoinPath(wsDir, "src", "kb", filename), string(content))
 		count++
diff --git a/pkg/agentic/prep_test.go b/pkg/agentic/prep_test.go
index e8de33b..fc6cac5 100644
--- a/pkg/agentic/prep_test.go
+++ b/pkg/agentic/prep_test.go
@@ -127,6 +127,19 @@ func TestDetectTestCmd_Good_DefaultsToGo(t *testing.T) {
 	assert.Equal(t, "go test ./...", detectTestCmd(dir))
 }
 
+func TestSanitiseBranchSlug_Good(t *testing.T) {
+	assert.Equal(t, "fix-login-bug", sanitiseBranchSlug("Fix login bug!", 40))
+	assert.Equal(t, "trim-me", sanitiseBranchSlug("---Trim Me---", 40))
+}
+
+func TestSanitiseBranchSlug_Good_Truncates(t *testing.T) {
+	assert.Equal(t, "feature", sanitiseBranchSlug("feature--extra", 7))
+}
+
+func TestSanitiseFilename_Good(t *testing.T) {
+	assert.Equal(t, "Core---Agent-Notes", sanitiseFilename("Core / Agent:Notes"))
+}
+
 func TestNewPrep_Good_Defaults(t *testing.T) {
 	t.Setenv("FORGE_TOKEN", "")
 	t.Setenv("GITEA_TOKEN", "")
diff --git a/pkg/agentic/sanitise.go b/pkg/agentic/sanitise.go
new file mode 100644
index 0000000..5a90d76
--- /dev/null
+++ b/pkg/agentic/sanitise.go
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: EUPL-1.2
+
+package agentic
+
+func sanitiseBranchSlug(text string, max int) string {
+	out := make([]rune, 0, len(text))
+	for _, r := range text {
+		switch {
+		case r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || r == '-':
+			out = append(out, r)
+		case r >= 'A' && r <= 'Z':
+			out = append(out, r+32)
+		default:
+			out = append(out, '-')
+		}
+
+		if max > 0 && len(out) >= max {
+			break
+		}
+	}
+
+	return trimRuneEdges(string(out), '-')
+}
+
+func sanitisePlanSlug(text string) string {
+	out := make([]rune, 0, len(text))
+	for _, r := range text {
+		switch {
+		case r >= 'a' && r <= 'z' || r >= '0' && r <= '9' || r == '-':
+			out = append(out, r)
+		case r >= 'A' && r <= 'Z':
+			out = append(out, r+32)
+		case r == ' ':
+			out = append(out, '-')
+		}
+	}
+
+	slug := collapseRepeatedRune(string(out), '-')
+	slug = trimRuneEdges(slug, '-')
+	if len(slug) > 30 {
+		slug = slug[:30]
+	}
+
+	return trimRuneEdges(slug, '-')
+}
+
+func sanitiseFilename(text string) string {
+	out := make([]rune, 0, len(text))
+	for _, r := range text {
+		switch {
+		case r >= 'a' && r <= 'z' || r >= 'A' && r <= 'Z' || r >= '0' && r <= '9' || r == '-' || r == '_' || r == '.':
+			out = append(out, r)
+		default:
+			out = append(out, '-')
+		}
+	}
+
+	return string(out)
+}
+
+func collapseRepeatedRune(text string, target rune) string {
+	runes := []rune(text)
+	out := make([]rune, 0, len(runes))
+	lastWasTarget := false
+
+	for _, r := range runes {
+		if r == target {
+			if lastWasTarget {
+				continue
+			}
+			lastWasTarget = true
+		} else {
+			lastWasTarget = false
+		}
+
+		out = append(out, r)
+	}
+
+	return string(out)
+}
+
+func trimRuneEdges(text string, target rune) string {
+	runes := []rune(text)
+	start := 0
+	end := len(runes)
+
+	for start < end && runes[start] == target {
+		start++
+	}
+
+	for end > start && runes[end-1] == target {
+		end--
+	}
+
+	return string(runes[start:end])
+}
diff --git a/pkg/lib/lib_test.go b/pkg/lib/lib_test.go
index 32fc1c9..5141d41 100644
--- a/pkg/lib/lib_test.go
+++ b/pkg/lib/lib_test.go
@@ -206,7 +206,7 @@ func TestExtractWorkspace_CreatesFiles(t *testing.T) {
 		t.Fatalf("ExtractWorkspace failed: %v", err)
 	}
 
-	for _, name := range []string{"CODEX.md", "CLAUDE.md", "PROMPT.md", "TODO.md", "CONTEXT.md"} {
+	for _, name := range []string{"CODEX.md", "CLAUDE.md", "PROMPT.md", "TODO.md", "CONTEXT.md", "go.work"} {
 		path := filepath.Join(dir, name)
 		if _, err := os.Stat(path); os.IsNotExist(err) {
 			t.Errorf("expected %s to exist", name)
diff --git a/pkg/lib/workspace/default/.gitignore.tmpl b/pkg/lib/workspace/default/.gitignore.tmpl
deleted file mode 100644
index cd276bb..0000000
--- a/pkg/lib/workspace/default/.gitignore.tmpl
+++ /dev/null
@@ -1,4 +0,0 @@
-.idea/
-.vscode/
-*.log
-.core/workspace
diff --git a/pkg/lib/workspace/default/CODEX.md.tmpl b/pkg/lib/workspace/default/CODEX.md.tmpl
index f3ba5f0..8e1bdf2 100644
--- a/pkg/lib/workspace/default/CODEX.md.tmpl
+++ b/pkg/lib/workspace/default/CODEX.md.tmpl
@@ -30,6 +30,7 @@ c := core.New(core.Options{
 | `c.Cli()` | `*Cli` | CLI surface (command tree → terminal) |
 | `c.IPC()` | `*Ipc` | Message bus (Action/Query/Task) |
 | `c.I18n()` | `*I18n` | Internationalisation + locale collection |
+| `c.Env("key")` | `string` | Read-only system/environment info |
 | `c.Options()` | `*Options` | Input configuration used to create Core |
 | `c.Context()` | `context.Context` | Application context (cancelled on shutdown) |
 
@@ -96,6 +97,64 @@ c.RegisterTask(func(c *core.Core, t core.Task) core.Result {
 })
 ```
 
+### Environment — use `core.Env()`, never `os.Getenv` for standard dirs
+
+Env is environment (read-only system facts). Config is ours (mutable app settings).
+
+```go
+// System
+core.Env("OS")        // "darwin", "linux", "windows"
+core.Env("ARCH")      // "arm64", "amd64"
+core.Env("DS")        // "/" or "\" (directory separator)
+core.Env("HOSTNAME")  // machine name
+core.Env("USER")      // current user
+
+// Directories
+core.Env("DIR_HOME")      // home dir (overridable via CORE_HOME env var)
+core.Env("DIR_CONFIG")    // OS config dir
+core.Env("DIR_CACHE")     // OS cache dir
+core.Env("DIR_DATA")      // OS data dir (platform-specific)
+core.Env("DIR_TMP")       // temp dir
+core.Env("DIR_CWD")       // working directory at startup
+core.Env("DIR_CODE")      // ~/Code
+core.Env("DIR_DOWNLOADS") // ~/Downloads
+
+// Timestamps
+core.Env("CORE_START")    // RFC3339 UTC boot timestamp
+```
+
+### Paths — use `core.Path()`, never `filepath.Join` or raw concatenation
+
+Path() is the single point of responsibility for filesystem paths. Every path goes through it — security fixes happen in one place.
+
+```go
+// WRONG
+home, _ := os.UserHomeDir()
+configPath := filepath.Join(home, ".config", "app.yaml")
+base := filepath.Base(configPath)
+
+// CORRECT
+configPath := core.Path(".config", "app.yaml")  // anchored to DIR_HOME
+base := core.PathBase(configPath)
+```
+
+```go
+// Relative → anchored to DIR_HOME
+core.Path("Code", ".core")       // "/Users/snider/Code/.core"
+core.Path(".config", "app.yaml") // "/Users/snider/.config/app.yaml"
+
+// Absolute → pass through (cleaned)
+core.Path("/tmp", "workspace")   // "/tmp/workspace"
+
+// No args → DIR_HOME
+core.Path()                      // "/Users/snider"
+
+// Component helpers
+core.PathBase("/a/b/c")          // "c"
+core.PathDir("/a/b/c")           // "/a/b"
+core.PathExt("main.go")          // ".go"
+```
+
 ## Mandatory Patterns
 
 ### Errors — use `core.E()`, never `fmt.Errorf` or `errors.New`
@@ -122,16 +181,35 @@ core.Info("starting server", "addr", addr)
 core.Error("operation failed", "err", err)
 ```
 
-### Filesystem — use `core.Fs{}`, never `os.ReadFile/WriteFile/MkdirAll`
+### Filesystem — use `core.Fs{}` + `core.Path()`, never `os.*` or `filepath.*`
 
 ```go
 var fs = &core.Fs{}
-r := fs.Read(path)           // returns core.Result
+
+// Build paths with Path() — never raw concatenation
+configPath := core.Path(".config", "app.yaml")
+
+// Read/write through Fs — never os.ReadFile/WriteFile
+r := fs.Read(configPath)
 if !r.OK { return r }
 content := r.Value.(string)
 
-fs.Write(path, content)      // returns core.Result
-fs.EnsureDir(dir)             // returns core.Result
+fs.Write(configPath, content)
+fs.EnsureDir(core.Path(".config"))
+
+// File checks — never os.Stat
+fs.Exists(path)              // bool
+fs.IsFile(path)              // bool
+fs.IsDir(path)               // bool
+
+// Directory listing — never os.ReadDir
+r := fs.List(dir)            // Result{[]os.DirEntry, true}
+
+// Append — never os.OpenFile
+r := fs.Append(logPath)      // Result{*os.File, true}
+
+// Delete — never os.Remove
+fs.Delete(path)              // Result
 ```
 
 ### Returns — use `core.Result`, never `(value, error)`
@@ -392,10 +470,15 @@ c.I18n().SetLanguage("en-GB")
 | `log` | `core.Error`, `core.Info` |
 | `strings` | `core.Contains`, `core.Split` etc |
 | `errors` | `core.E`, `core.Wrap` |
+| `path/filepath` | `core.Path`, `core.PathBase`, `core.PathDir`, `core.PathExt` |
 | `io/ioutil` | `core.Fs{}` |
 | `os` (file ops) | `core.Fs{}` |
+| `os.UserHomeDir` | `core.Env("DIR_HOME")` |
+| `os.Getenv` (standard dirs) | `core.Env("DIR_CONFIG")` etc |
+| `runtime.GOOS` | `core.Env("OS")` |
+| `runtime.GOARCH` | `core.Env("ARCH")` |
 
-Acceptable stdlib: `os.Getenv`, `os.Exit`, `os.Stderr`, `os.UserHomeDir`, `context`, `sync`, `time`, `net/http`, `encoding/json`, `path/filepath`.
+Acceptable stdlib: `os.Exit`, `os.Stderr`, `os.Getenv` (non-standard keys), `context`, `sync`, `time`, `net/http`, `encoding/json`.
 
 ## Build & Test
 
diff --git a/pkg/lib/workspace/default/go.work.tmpl b/pkg/lib/workspace/default/go.work.tmpl
index 957f5b9..3ed003a 100644
--- a/pkg/lib/workspace/default/go.work.tmpl
+++ b/pkg/lib/workspace/default/go.work.tmpl
@@ -1,3 +1,3 @@
 go 1.26.0
 
-use .
+use ./src
diff --git a/pkg/lib/workspace/review/PROMPT.md.tmpl b/pkg/lib/workspace/review/PROMPT.md.tmpl
new file mode 100644
index 0000000..8e1a6ad
--- /dev/null
+++ b/pkg/lib/workspace/review/PROMPT.md.tmpl
@@ -0,0 +1,14 @@
+Read CLAUDE.md for review instructions. Read CODEX.md for the AX conventions to audit against.
+
+## Mode: AUDIT ONLY
+
+You are a reviewer. You do NOT fix code. You do NOT commit.
+
+1. Read every .go file in cmd/ and pkg/
+2. Check each against the patterns in CODEX.md
+3. Report findings to stdout with: severity (critical/high/medium/low), file:line, one-sentence description
+4. Group by package
+
+If you find merge conflicts, report them as critical findings — do not resolve them.
+
+Do NOT run the closeout sequence. Do NOT use code-review agents. Do NOT commit. Report and stop.
diff --git a/pkg/monitor/harvest.go b/pkg/monitor/harvest.go
index 8f6fad3..dabd064 100644
--- a/pkg/monitor/harvest.go
+++ b/pkg/monitor/harvest.go
@@ -13,6 +13,7 @@ import (
 	"context"
 	"encoding/json"
 	"os/exec"
+	"path/filepath"
 	"strconv"
 
 	"dappco.re/go/agent/pkg/agentic"
@@ -31,12 +32,15 @@ type harvestResult struct {
 // branches back to the source repos. Returns a summary message.
 func (m *Subsystem) harvestCompleted() string {
 	wsRoot := agentic.WorkspaceRoot()
-	entries := core.PathGlob(workspaceStatusGlob(wsRoot))
+	entries, err := filepath.Glob(workspaceStatusGlob(wsRoot))
+	if err != nil {
+		return ""
+	}
 
 	var harvested []harvestResult
 
 	for _, entry := range entries {
-		wsDir := core.PathDir(monitorPath(entry))
+		wsDir := filepath.Dir(entry)
 		result := m.harvestWorkspace(wsDir)
 		if result != nil {
 			harvested = append(harvested, *result)
@@ -98,7 +102,7 @@ func (m *Subsystem) harvestWorkspace(wsDir string) *harvestResult {
 	}
 
 	srcDir := core.Concat(wsDir, "/src")
-	if !fs.Exists(srcDir) || fs.IsFile(srcDir) {
+	if !fs.IsDir(srcDir) {
 		return nil
 	}
 
@@ -200,8 +204,12 @@ func countUnpushed(srcDir, branch string) int {
 // Checks ALL changed files (added, modified, renamed), not just new.
 // Fails closed: if git diff fails, rejects the workspace.
 func checkSafety(srcDir string) string {
-	files, ok := changedFilesSinceDefault(srcDir)
-	if !ok {
+	// Check all changed files — added, modified, renamed
+	base := defaultBranch(srcDir)
+	cmd := exec.Command("git", "diff", "--name-only", core.Concat(base, "...HEAD"))
+	cmd.Dir = srcDir
+	out, err := cmd.Output()
+	if err != nil {
 		return "safety check failed: git diff error"
 	}
 
@@ -215,18 +223,21 @@ func checkSafety(srcDir string) string {
 		".db": true, ".sqlite": true, ".sqlite3": true,
 	}
 
-	for _, file := range files {
-		ext := core.Lower(core.PathExt(file))
+	for _, file := range core.Split(core.Trim(string(out)), "\n") {
+		if file == "" {
+			continue
+		}
+		ext := core.Lower(filepath.Ext(file))
 		if binaryExts[ext] {
 			return core.Sprintf("binary file added: %s", file)
 		}
 
 		// Check file size (reject > 1MB)
 		fullPath := core.Concat(srcDir, "/", file)
-		r := fs.Stat(fullPath)
-		size, ok := resultFileSize(r)
-		if ok && size > 1024*1024 {
-			return core.Sprintf("large file: %s (%d bytes)", file, size)
+		if stat := fs.Stat(fullPath); stat.OK {
+			if info, ok := stat.Value.(interface{ Size() int64 }); ok && info.Size() > 1024*1024 {
+				return core.Sprintf("large file: %s (%d bytes)", file, info.Size())
+			}
 		}
 	}
 
@@ -235,26 +246,18 @@ func checkSafety(srcDir string) string {
 
 // countChangedFiles returns the number of files changed vs the default branch.
 func countChangedFiles(srcDir string) int {
-	files, ok := changedFilesSinceDefault(srcDir)
-	if !ok {
-		return 0
-	}
-	return len(files)
-}
-
-func changedFilesSinceDefault(srcDir string) ([]string, bool) {
 	base := defaultBranch(srcDir)
 	cmd := exec.Command("git", "diff", "--name-only", core.Concat(base, "...HEAD"))
 	cmd.Dir = srcDir
 	out, err := cmd.Output()
 	if err != nil {
-		return nil, false
+		return 0
 	}
 	lines := core.Split(core.Trim(string(out)), "\n")
 	if len(lines) == 1 && lines[0] == "" {
-		return nil, true
+		return 0
 	}
-	return lines, true
+	return len(lines)
 }
 
 // pushBranch pushes the agent's branch to origin.
@@ -268,19 +271,6 @@ func pushBranch(srcDir, branch string) error {
 	return nil
 }
 
-func resultFileSize(r core.Result) (int64, bool) {
-	type sizable interface {
-		Size() int64
-	}
-
-	switch value := r.Value.(type) {
-	case sizable:
-		return value.Size(), true
-	default:
-		return 0, false
-	}
-}
-
 // updateStatus updates the workspace status.json.
 func updateStatus(wsDir, status, question string) {
 	r := fs.Read(workspaceStatusPath(wsDir))
diff --git a/pkg/setup/config.go b/pkg/setup/config.go
index 6fc7b55..bdd16b1 100644
--- a/pkg/setup/config.go
+++ b/pkg/setup/config.go
@@ -3,9 +3,9 @@
 package setup
 
 import (
+	neturl "net/url"
 	"os/exec"
 	"path/filepath"
-	"strings"
 
 	core "dappco.re/go/core"
 	"gopkg.in/yaml.v3"
@@ -136,7 +136,7 @@ func GenerateTestConfig(projType ProjectType) (string, error) {
 }
 
 func renderConfig(comment string, sections []configSection) (string, error) {
-	var builder strings.Builder
+	builder := core.NewBuilder()
 
 	if comment != "" {
 		builder.WriteString("# ")
@@ -157,7 +157,7 @@ func renderConfig(comment string, sections []configSection) (string, error) {
 			builder.WriteString("  ")
 			builder.WriteString(value.Key)
 			builder.WriteString(": ")
-			builder.WriteString(strings.TrimSpace(string(scalar)))
+			builder.WriteString(core.Trim(string(scalar)))
 			builder.WriteString("\n")
 		}
 
@@ -177,32 +177,31 @@ func detectGitRemote(path string) string {
 	if err != nil {
 		return ""
 	}
-	url := strings.TrimSpace(string(output))
+	return parseGitRemote(core.Trim(string(output)))
+}
 
-	// SSH: git@github.com:owner/repo.git or ssh://git@forge.lthn.ai:2223/core/agent.git
-	if strings.Contains(url, ":") {
-		parts := strings.SplitN(url, ":", 2)
-		if len(parts) == 2 {
-			repo := parts[1]
-			repo = strings.TrimSuffix(repo, ".git")
-			// Handle port in SSH URL (ssh://git@host:port/path)
-			if strings.Contains(repo, "/") {
-				segments := strings.SplitN(repo, "/", 2)
-				if len(segments) == 2 && strings.ContainsAny(segments[0], "0123456789") {
-					repo = segments[1]
-				}
-			}
-			return repo
-		}
+func parseGitRemote(remote string) string {
+	if remote == "" {
+		return ""
 	}
 
-	// HTTPS: https://github.com/owner/repo.git
-	for _, host := range []string{"github.com/", "forge.lthn.ai/"} {
-		if idx := strings.Index(url, host); idx >= 0 {
-			repo := url[idx+len(host):]
-			return strings.TrimSuffix(repo, ".git")
-		}
+	if parsed, err := neturl.Parse(remote); err == nil && parsed.Host != "" {
+		return trimRemotePath(parsed.Path)
+	}
+
+	parts := core.SplitN(remote, ":", 2)
+	if len(parts) == 2 && core.Contains(parts[0], "@") {
+		return trimRemotePath(parts[1])
+	}
+
+	if core.Contains(remote, "/") {
+		return trimRemotePath(remote)
 	}
 
 	return ""
 }
+
+func trimRemotePath(remote string) string {
+	trimmed := core.TrimPrefix(remote, "/")
+	return core.TrimSuffix(trimmed, ".git")
+}
diff --git a/pkg/setup/setup.go b/pkg/setup/setup.go
index c25520b..a4e3cc2 100644
--- a/pkg/setup/setup.go
+++ b/pkg/setup/setup.go
@@ -3,10 +3,8 @@
 package setup
 
 import (
-	"fmt"
 	"os"
 	"path/filepath"
-	"strings"
 
 	"dappco.re/go/agent/pkg/lib"
 	core "dappco.re/go/core"
@@ -106,7 +104,7 @@ func scaffoldTemplate(opts Options, projType ProjectType) error {
 	data := &lib.WorkspaceData{
 		Repo:            filepath.Base(opts.Path),
 		Branch:          "main",
-		Task:            fmt.Sprintf("Initialise %s project tooling.", projType),
+		Task:            core.Sprintf("Initialise %s project tooling.", projType),
 		Agent:           "setup",
 		Language:        string(projType),
 		Prompt:          "This workspace was scaffolded by pkg/setup. Review the repository and continue from the generated context files.",
@@ -209,7 +207,7 @@ func defaultTestCommand(projType ProjectType) string {
 }
 
 func formatFlow(projType ProjectType) string {
-	var builder strings.Builder
+	builder := core.NewBuilder()
 	builder.WriteString("- Build: `")
 	builder.WriteString(defaultBuildCommand(projType))
 	builder.WriteString("`\n")
diff --git a/pkg/setup/setup_test.go b/pkg/setup/setup_test.go
index 2772348..4e60eb4 100644
--- a/pkg/setup/setup_test.go
+++ b/pkg/setup/setup_test.go
@@ -30,6 +30,26 @@ func TestGenerateBuildConfig_Good(t *testing.T) {
 	assert.Contains(t, cfg, "cgo: false")
 }
 
+func TestParseGitRemote_Good(t *testing.T) {
+	tests := map[string]string{
+		"https://github.com/dAppCore/go-io.git":       "dAppCore/go-io",
+		"git@github.com:dAppCore/go-io.git":           "dAppCore/go-io",
+		"ssh://git@forge.lthn.ai:2223/core/agent.git": "core/agent",
+		"ssh://git@forge.lthn.ai:2223/core/agent":     "core/agent",
+		"git@forge.lthn.ai:core/agent.git":            "core/agent",
+		"/srv/git/core/agent.git":                     "srv/git/core/agent",
+	}
+
+	for remote, want := range tests {
+		assert.Equal(t, want, parseGitRemote(remote), remote)
+	}
+}
+
+func TestParseGitRemote_Bad(t *testing.T) {
+	assert.Equal(t, "", parseGitRemote(""))
+	assert.Equal(t, "", parseGitRemote("origin"))
+}
+
 func TestRun_Good(t *testing.T) {
 	dir := t.TempDir()
 	require.True(t, fs.WriteMode(filepath.Join(dir, "go.mod"), "module example.com/test\n", 0644).OK)