Session: radiant-implementing-knuth — 2026-04-05

Project: demo-beta · Branch: main · Mode: default · Model: claude-opus-4-6

Stats: 6 user messages, 12 tool calls, tools used: Read, Write, Edit, Bash, Glob.

Conversation¶

Turn 1 — User¶

Let's build stilo. Start with go.mod + cmd/stilo/main.go skeleton.

Turn 1 — Assistant¶

Tools used:

• Bash: cd /Users/USER/Desktop/demo-beta && go mod init github.com/USER/stilo
• Write: /Users/USER/Desktop/demo-beta/go.mod (82 chars)

module github.com/USER/stilo

go 1.22

Tools used:

• Write: /Users/USER/Desktop/demo-beta/cmd/stilo/main.go (624 chars)

package main

import (
    "flag"
    "fmt"
    "log"
    "os"
)

func main() {
    var (
        contentDir = flag.String("content", "content", "content directory")
        publicDir  = flag.String("public", "public", "output directory")
    )
    flag.Parse()

    if _, err := os.Stat(*contentDir); os.IsNotExist(err) {
        log.Fatalf("content dir does not exist: %s", *contentDir)
    }
    if err := os.MkdirAll(*publicDir, 0o755); err != nil {
        log.Fatalf("cannot create public dir: %v", err)
    }
    fmt.Printf("stilo: walking %s → %s\n", *contentDir, *publicDir)
    // TODO: walk + render
}

Skeleton done. go build ./cmd/stilo should compile cleanly now.

Turn 2 — User¶

Build and try it.

Turn 2 — Assistant¶

Tools used:

• Bash: cd /Users/USER/Desktop/demo-beta && go build ./cmd/stilo

Tool results:

(no output — success)

Tools used:

• Bash: cd /Users/USER/Desktop/demo-beta && mkdir -p content public && ./stilo

Tool results:

stilo: walking content → public

Compiles and runs. Next: the content walker.

Turn 3 — User¶

Write the content walker with frontmatter parsing. Keep it in internal/content/.

Turn 3 — Assistant¶

Tools used:

• Write: /Users/USER/Desktop/demo-beta/internal/content/content.go (920 chars)

package content

import (
    "bytes"
    "fmt"
    "os"
    "strings"
)

type Post struct {
    Path        string
    Title       string
    Date        string
    Body        []byte
}

func Load(path string) (*Post, error) {
    raw, err := os.ReadFile(path)
    if err != nil {
        return nil, err
    }
    if !bytes.HasPrefix(raw, []byte("---\n")) {
        return &Post{Path: path, Body: raw}, nil
    }
    end := bytes.Index(raw[4:], []byte("\n---\n"))
    if end < 0 {
        return nil, fmt.Errorf("%s: unterminated frontmatter", path)
    }
    fmRaw := string(raw[4 : 4+end])
    body := raw[4+end+5:]
    p := &Post{Path: path, Body: body}
    for _, line := range strings.Split(fmRaw, "\n") {
        k, v, ok := strings.Cut(line, ":")
        if !ok {
            continue
        }
        v = strings.TrimSpace(v)
        switch strings.TrimSpace(k) {
        case "title":
            p.Title = strings.Trim(v, `"`)
        case "date":
            p.Date = v
        }
    }
    return p, nil
}

This is the simplest possible frontmatter parser — no YAML library, just string splits. Handles title: and date: for now. We can add more fields later.

Turn 4 — User¶

Write a test for Load.

Turn 4 — Assistant¶

Tools used:

• Write: /Users/USER/Desktop/demo-beta/internal/content/content_test.go (512 chars)

package content

import (
    "os"
    "path/filepath"
    "testing"
)

func TestLoad_WithFrontmatter(t *testing.T) {
    dir := t.TempDir()
    p := filepath.Join(dir, "post.md")
    os.WriteFile(p, []byte("---\ntitle: Hello\ndate: 2026-04-05\n---\n# Hi\n"), 0o644)

    post, err := Load(p)
    if err != nil {
        t.Fatal(err)
    }
    if post.Title != "Hello" {
        t.Errorf("title: got %q", post.Title)
    }
    if post.Date != "2026-04-05" {
        t.Errorf("date: got %q", post.Date)
    }
    if string(post.Body) != "# Hi\n" {
        t.Errorf("body: got %q", post.Body)
    }
}

func TestLoad_NoFrontmatter(t *testing.T) {
    dir := t.TempDir()
    p := filepath.Join(dir, "post.md")
    os.WriteFile(p, []byte("# Just content\n"), 0o644)

    post, err := Load(p)
    if err != nil {
        t.Fatal(err)
    }
    if string(post.Body) != "# Just content\n" {
        t.Errorf("body: got %q", post.Body)
    }
}

Turn 5 — User¶

Run the tests.

Turn 5 — Assistant¶

Tools used:

• Bash: cd /Users/USER/Desktop/demo-beta && go test ./internal/content/...

Tool results:

ok      github.com/USER/stilo/internal/content  0.003s

Both tests pass.

Turn 6 — User¶

Commit with something reasonable and let's pause.

Turn 6 — Assistant¶

Tools used:

• Bash: cd /Users/USER/Desktop/demo-beta && git add cmd internal go.mod && git commit -m "feat: stilo skeleton + content loader with frontmatter"

Tool results:

[main def5678] feat: stilo skeleton + content loader with frontmatter
 4 files changed, 156 insertions(+)
 create mode 100644 cmd/stilo/main.go
 create mode 100644 go.mod
 create mode 100644 internal/content/content.go
 create mode 100644 internal/content/content_test.go

Session summary: stilo is now a compiling Go binary with a frontmatter-aware content loader and passing tests. Next session tackles internal/walk/ and internal/render/, then we can render the first actual blog post.