Files
hyperguild/ingestion/internal/pipeline/build.go
mathias ce365eee44 feat(pipeline): skip extraction when the source has not changed (#105)
Ingest now stamps source_hash — sha256 of the ingested body, frontmatter
excluded — onto the source page, and compares it before doing any work. An
unchanged source returns Skipped with no LLM call at all.

This is cost and signal, not correctness: #103 already made a re-ingest
byte-identical, so a repeated run was harmless but not free — a full
extraction over every chunk to produce a result that merges to nothing.
Building this first would have put idempotency in the guard rather than in
the write, which is the wrong dependency direction.

Body-only hashing on purpose. A re-crawl that stamps a new fetch date has
not changed the source, and treating that as drift would re-extract the
whole corpus every time a crawler ran. A missing or unreadable hash always
means "extract": a missed skip costs one extraction, a wrong skip loses an
update silently, and silence is the failure mode this repo keeps paying
for.

The skip is reported (Result.Skipped plus a warning naming the hash), not
silent — a run that does nothing must say so, or "the pipeline is fine" and
"the pipeline stopped working" look identical (#107).

Storing the hash required settling who owns which frontmatter field. #103
made the on-disk block win wholesale, which protects human-set metadata
from a regenerating writer but froze fields the generator legitimately
owns. wiki.Merge now refreshes an explicit generatorOwned allowlist —
last_updated and source_hash — and keeps everything else on disk. An
allowlist rather than a carve-out, so a field nobody has thought about
stays human-owned by default. That also retires the last_updated
limitation #103 shipped with.

Refs #105, #103, #107, brain#21.
2026-08-22 16:15:56 +02:00

119 lines
3.1 KiB
Go

// ingestion/internal/pipeline/build.go
package pipeline
import (
"fmt"
"strings"
"github.com/mathiasbq/hyperguild/ingestion/internal/wiki"
)
// BuildPages converts RawPages from the LLM into wiki.Pages with computed slugs,
// paths, and YAML frontmatter. sourceSlug is the slug of the source being ingested
// (derived from the filename, not the LLM title). Pages whose title resolves to an
// empty slug are skipped and returned as warnings instead.
func BuildPages(rawPages []RawPage, sourceSlug, date string) ([]wiki.Page, []string) {
out := make([]wiki.Page, 0, len(rawPages))
var warnings []string
for _, rp := range rawPages {
slug := computeSlug(rp, sourceSlug)
if slug == "" {
warnings = append(warnings, fmt.Sprintf("skipped page with empty title (type: %s)", rp.Type))
continue
}
out = append(out, buildPage(rp, sourceSlug, date))
}
return out, warnings
}
func computeSlug(rp RawPage, sourceSlug string) string {
if rp.Type == "source" {
return sourceSlug
}
return wiki.Slug(rp.Title)
}
func buildPage(rp RawPage, sourceSlug, date string) wiki.Page {
var slug, dir string
switch rp.Type {
case "source":
slug = sourceSlug
dir = "wiki/sources"
case "concept":
slug = wiki.Slug(rp.Title)
dir = "wiki/concepts"
case "entity":
slug = wiki.Slug(rp.Title)
dir = "wiki/entities"
default:
slug = wiki.Slug(rp.Title)
dir = "wiki/" + rp.Type
}
path := dir + "/" + slug + ".md"
fm := buildFrontmatter(rp, date)
return wiki.Page{
Path: path,
Content: fm + "\n" + rp.Content,
}
}
func buildFrontmatter(rp RawPage, date string) string {
var sb strings.Builder
sb.WriteString("---\n")
fmt.Fprintf(&sb, "title: %s\n", yamlScalar(rp.Title))
switch rp.Type {
case "source":
subtype := rp.Subtype
if subtype == "" {
subtype = "article"
}
fmt.Fprintf(&sb, "type: %s\n", yamlScalar(subtype))
if rp.Domain != "" {
fmt.Fprintf(&sb, "domain: %s\n", yamlScalar(rp.Domain))
}
fmt.Fprintf(&sb, "date_ingested: %s\n", date)
fmt.Fprintf(&sb, "last_updated: %s\n", date)
if rp.SourceHash != "" {
fmt.Fprintf(&sb, "source_hash: %s\n", rp.SourceHash)
}
if rp.Source != "" {
fmt.Fprintf(&sb, "source: %s\n", yamlScalar(rp.Source))
}
if rp.Author != "" {
fmt.Fprintf(&sb, "author: %s\n", yamlScalar(rp.Author))
}
if rp.Published != "" {
fmt.Fprintf(&sb, "published: %s\n", yamlScalar(rp.Published))
}
case "concept":
if rp.Domain != "" {
fmt.Fprintf(&sb, "domain: %s\n", yamlScalar(rp.Domain))
}
fmt.Fprintf(&sb, "last_updated: %s\n", date)
case "entity":
if rp.Subtype != "" {
fmt.Fprintf(&sb, "type: %s\n", yamlScalar(rp.Subtype))
}
if rp.Domain != "" {
fmt.Fprintf(&sb, "domain: %s\n", yamlScalar(rp.Domain))
}
fmt.Fprintf(&sb, "last_updated: %s\n", date)
default:
if rp.Domain != "" {
fmt.Fprintf(&sb, "domain: %s\n", yamlScalar(rp.Domain))
}
fmt.Fprintf(&sb, "last_updated: %s\n", date)
}
fmt.Fprintf(&sb, "aliases:\n - %s\n", yamlScalar(rp.Title))
sb.WriteString("---\n")
return sb.String()
}
func yamlScalar(s string) string {
return "'" + strings.ReplaceAll(s, "'", "''") + "'"
}