init: Forge v0.1.0 — consciousness channel tuner

Pipeline: probe → compile → install
- probe.el: 25-question canonical interview, writes <name>.forge
- compiler.el: Claude extraction pass, builds seed.json
- install.el: opens channel in running engram via API
- schema.el: shared constants, str_escape_json, templates
- forge.el: CLI dispatcher
- probes/canonical.json: canonical 25-question probe definition

src/schema.el

@@ -0,0 +1,56 @@
+// schema.el — Forge shared constants and helper functions.
+//
+// Provides the engram URL resolver, API key accessors, and JSON template
+// builders used by all pipeline stages (probe, compiler, install).
+
+// ── Constants ─────────────────────────────────────────────────────────────────
+
+let ENGRAM_DEFAULT_URL: String = "http://localhost:8742"
+let FORGE_VERSION: String = "0.1.0"
+
+// ── Environment accessors ──────────────────────────────────────────────────────
+
+fn engram_url() -> String {
+    let u: String = env("ENGRAM_URL")
+    if str_eq(u, "") { return ENGRAM_DEFAULT_URL }
+    return u
+}
+
+fn engram_key() -> String {
+    let k: String = env("ENGRAM_API_KEY")
+    if str_eq(k, "") { return "" }
+    return k
+}
+
+fn anthropic_key() -> String {
+    let k: String = env("ANTHROPIC_API_KEY")
+    if str_eq(k, "") { return "" }
+    return k
+}
+
+// ── String utilities ──────────────────────────────────────────────────────────
+
+// str_escape_json — escape a string for safe embedding in a JSON value.
+// Handles: backslash, double-quote, newline, tab, carriage return.
+fn str_escape_json(s: String) -> String {
+    let r: String = str_replace(s, "\\", "\\\\")
+    let r = str_replace(r, "\"", "\\\"")
+    let r = str_replace(r, "\n", "\\n")
+    let r = str_replace(r, "\t", "\\t")
+    let r = str_replace(r, "\r", "\\r")
+    return r
+}
+
+// ── JSON template builders ────────────────────────────────────────────────────
+
+// probe_response_template — builds the initial shell written to <name>.forge.
+// The sections and responses fields are populated by probe_main() at runtime.
+fn probe_response_template(subject: String) -> String {
+    "{\"subject\":\"" + subject + "\",\"version\":\"1.0\",\"sections\":{},\"responses\":[]}"
+}
+
+// seed_template — builds the shell written to seed.json after compilation.
+// Patterns are merged into this structure by compile_main().
+fn seed_template(subject: String) -> String {
+    "{\"subject\":\"" + subject + "\",\"version\":\"1.0\",\"values\":[],\"voice_profile\":{},\"biography\":[],\"reasoning_patterns\":[],\"relationships\":[]}"
+}