fix(newos4): the loop guard reads the config it documents

MAINT-004. The guard read warnAt/blockAt/hardStopAt while one config path wrote `threshold`, and
`enabled` was never consulted anywhere — writing {"enabled": false} into webx11_ai_config changed
nothing at all. One resolver, _loopPolicy(), now normalises both spellings, guarantees
warnAt <= blockAt < hardStopAt, and both the block and the warning are gated on enabled.

Live on v4.6.110 (_loopPolicy called in the page): defaults {warn 3, block 6, hardstop 9};
{threshold: 4} -> {warn 2, block 4, hardstop 7}; {enabled: false, threshold: 3} -> enabled false.
test-loop-policy.js: 17 asserts, RED on HEAD ("_loopPolicy is not a function"), suite 16/16.

1 files changed, 24 insertions, 6 deletions

diff --git a/modules/core/core-bundle.js b/modules/core/core-bundle.js
index 6e9542e..8d6cbda 100644
--- a/modules/core/core-bundle.js
+++ b/modules/core/core-bundle.js
@@ -9841,6 +9841,23 @@ buildSystemPrompt() {
                 }
                 return result.substring(0, maxLen) + '...(truncated from ' + result.length + ' chars)';
             }
+            // MAINT-004: the loop guard read warnAt/blockAt/hardStopAt while one config path wrote
+            // `threshold`, and `enabled` was never consulted at all — turning the guard off in
+            // config changed nothing. One resolver, one set of defaults, explicit disable.
+            _loopPolicy(cfg) {
+                const c = cfg || {};
+                const threshold = Number(c.threshold);
+                const blockAt = Number(c.blockAt) || (Number.isFinite(threshold) && threshold > 0 ? threshold : 6);
+                const warnAt = Number(c.warnAt) || Math.max(2, blockAt - 3);
+                const hardStopAt = Number(c.hardStopAt) || blockAt + 3;
+                return {
+                    enabled: c.enabled !== false,
+                    windowMs: Number(c.windowMs) || 30000,
+                    warnAt: Math.min(warnAt, blockAt),
+                    blockAt,
+                    hardStopAt: Math.max(hardStopAt, blockAt + 1)
+                };
+            }
             // MAINT-023: one agentic turn used to grow without limit — every role:'tool' body was
             // pushed verbatim and only this.context was trimmed BETWEEN turns, so a measured turn
             // went 6 → 112 705 tokens across 8 model calls (maxContextTokens is 12 000). Two
@@ -10043,6 +10060,7 @@ buildSystemPrompt() {
                     } catch (_e) {}
                 };
                 var loopDetect = loopCfg.loopDetection || { enabled: true, threshold: 6, windowMs: 30000 };
+                var _lp = this._loopPolicy(loopDetect);
                 var confEsc = loopCfg.confidenceEscalation || { enabled: true, threshold: 90 };
                 var finalPrompt = loopCfg.finalTurnPrompt || 'This is your last tool turn. You MUST provide a final answer after this tool call. Synthesize what you know.';
                 // Memory-augmented planning: inject prior loop lessons as negative constraints
@@ -10077,10 +10095,10 @@ buildSystemPrompt() {
                 } catch (e) { /* VFS not available — skip memory-augmented planning */ }
                 let toolTurns = 0;
                 const _seenCalls = new Map();   // sig -> {count, ts, resultHash, blocked, lastResult}
-                const _loopWindow = loopDetect.windowMs || 30000;
-                const _warnAt = loopDetect.warnAt || 3;
-                const _blockAt = loopDetect.blockAt || 6;
-                const _hardStopAt = loopDetect.hardStopAt || 9;
+                const _loopWindow = _lp.windowMs;
+                const _warnAt = _lp.warnAt;
+                const _blockAt = _lp.blockAt;
+                const _hardStopAt = _lp.hardStopAt;
                 const _agentTag = opts.agentTag || 'main';
                 this._pendingBlockedReplays = null;
                 const _sigHash = (s) => {
@@ -10166,13 +10184,13 @@ buildSystemPrompt() {
                             const argPreview = String(_argKey || '')
                                 .replace(/(token|key|secret|password|bearer)[^,}]*/ig, '$1:[redacted]')
                                 .slice(0, 60);
-                            if (entry.blocked || entry.count >= _blockAt) {
+                            if (_lp.enabled && (entry.blocked || entry.count >= _blockAt)) {
                                 entry.blocked = true;
                                 blocked.push({ tc, entry });
                                 this.terminal.print(`🔄 Loop guard: ${_agentTag} repeated ${tc.function.name}(${argPreview}) ${entry.count}x with an unchanged result — serving cached result, not re-running`, 'warning');
                                 continue;
                             }
-                            if (entry.count === _warnAt) {
+                            if (_lp.enabled && entry.count === _warnAt) {
                                 this.terminal.print(`⚠️ Loop warning: ${_agentTag} called ${tc.function.name}(${argPreview}) ${entry.count}x — reuse the previous result or change the request`, 'warning');
                             }
                         }