{"schema_version":"onlylabs.public_signal.v1","title":"StepFun Fork: stepfun-ai/vllm","description":"StepFun fork signal with public source context, captured evidence pages, related signals, and category-scoped analysis context.","url":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42","json_url":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42/signal.json","generated_at":"2026-06-11T02:54:23.367172+00:00","org":{"slug":"stepfun","name":"StepFun","category":"neolab","category_label":"Neolab","dossier_url":"https://onlylabs.fyi/labs/stepfun","dossier_json_url":"https://onlylabs.fyi/labs/stepfun/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42","signal_json":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42/signal.json","source":"https://github.com/stepfun-ai/vllm","lab_dossier":"https://onlylabs.fyi/labs/stepfun","lab_dossier_json":"https://onlylabs.fyi/labs/stepfun/dossier.json","analysis":"https://onlylabs.fyi/analysis/stepfun","analysis_json":"https://onlylabs.fyi/analysis/stepfun/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/stepfun/evidence.json","category":"https://onlylabs.fyi/neolabs","category_json":"https://onlylabs.fyi/neolabs.json","category_feed":"https://onlylabs.fyi/neolabs/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json?category=neolab","topic":"https://onlylabs.fyi/topics/forks","topic_signals_json":"https://onlylabs.fyi/topics/forks/signals.json?category=neolab","topic_feed":"https://onlylabs.fyi/topics/forks/feed.xml?category=neolab","data_business":null},"answer_pack":{"answer":"StepFun forked stepfun-ai/vllm (forked from vllm-project/vllm). This fork signal points to upstream code the lab may be inspecting, patching, or building on. High-signal details: repo stepfun-ai/vllm · parent vllm-project/vllm · Routine fork, low stars.. onlylabs links this event to 1 captured evidence page and 1 related fork signal.","signal_desk":"forks","source_context":{"source_url":"https://github.com/stepfun-ai/vllm","source_host":"github.com","occurred_at":"2025-02-18T07:53:03+00:00","first_seen_at":"2026-06-05T20:58:53.52612+00:00","date_source":"source","context":"forked from vllm-project/vllm"},"context_markers":[{"label":"Lab","value":"StepFun","source":"signal"},{"label":"Signal desk","value":"forks","source":"signal"},{"label":"Source host","value":"github.com","source":"source"},{"label":"Repository","value":"stepfun-ai/vllm","source":"source"},{"label":"Parent","value":"vllm-project/vllm","source":"source"},{"label":"Stars","value":"44","source":"traction"},{"label":"Notability","value":"Routine fork, low stars.","source":"signal"},{"label":"Watch term","value":"Model card","source":"model"},{"label":"Watch term","value":"Data pipeline","source":"evidence"},{"label":"Watch term","value":"Infrastructure","source":"evidence"},{"label":"Watch term","value":"Safety and alignment","source":"evidence"}],"evidence_coverage":{"target_pages":1,"captured_pages":1,"readable_pages":1,"capture_methods":["plain"],"missing_page_urls":[],"failed_page_urls":[],"blocked_page_urls":[],"page_urls":["https://github.com/stepfun-ai/vllm"],"related_signals":1,"has_source_url":true,"latest_page_fetched_at":"2026-06-11T02:54:23.367172+00:00"},"data_business":{"matches":false,"lanes":[],"matched_terms":[],"score":null,"reason":null},"agent_handoff":{"signal_json":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42/signal.json","dossier_json":"https://onlylabs.fyi/labs/stepfun/dossier.json","analysis_json":"https://onlylabs.fyi/analysis/stepfun/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/stepfun/evidence.json","topic_signals_json":"https://onlylabs.fyi/topics/forks/signals.json?category=neolab","topic_feed":"https://onlylabs.fyi/topics/forks/feed.xml?category=neolab","category_signals_json":"https://onlylabs.fyi/signals.json?category=neolab","data_radar_json":null,"opportunities_json":null},"analysis_playbook":{"objective":"Turn fork activity into a map of upstream tools, libraries, model utilities, agent frameworks, and research dependencies being inspected or adapted.","evidence_focus":["forked parent repo","repo owner","language","description","stars","org and recency"],"extraction_questions":["Which upstream projects are repeated across labs?","Which forks point to evals, agents, infrastructure, model tooling, or data pipelines?","Which low-profile forks could precede a release or hiring wave?","Which labs are converging on the same technical adjacency?"],"signal_questions":["What upstream dependency or technical adjacency does this fork reveal?","Which upstream projects are repeated across labs?","Which forks point to evals, agents, infrastructure, model tooling, or data pipelines?","Do the 1 related fork signals show a repeated pattern?"],"output_fields":["org","upstream_repo","language","technical_theme","evidence_url"],"data_business_relevance":"Data-business lane extraction is scoped to frontier labs; for this category, keep conclusions tied to category-specific strategy, source evidence, and follow-up questions.","required_sources":[{"label":"signal_json","url":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42/signal.json","required":true},{"label":"source","url":"https://github.com/stepfun-ai/vllm","required":true},{"label":"dossier_json","url":"https://onlylabs.fyi/labs/stepfun/dossier.json","required":true},{"label":"analysis_evidence_json","url":"https://onlylabs.fyi/analysis/stepfun/evidence.json","required":true},{"label":"topic_signals_json","url":"https://onlylabs.fyi/topics/forks/signals.json?category=neolab","required":false},{"label":"data_radar_json","url":null,"required":false}],"expected_output":["one-paragraph source-grounded interpretation","category-specific implication","confidence and missing evidence","recommended next source to inspect"],"prompt_seed":"Using only the linked onlylabs JSON, captured source context, and cited evidence, analyze StepFun's fork signal \"stepfun-ai/vllm\" for neolab strategy."},"semantic_triples":[{"subject":"StepFun","predicate":"forked","object":"stepfun-ai/vllm","text":"StepFun forked stepfun-ai/vllm."},{"subject":"stepfun-ai/vllm","predicate":"is classified as","object":"fork signal","text":"stepfun-ai/vllm is classified as fork signal."},{"subject":"stepfun-ai/vllm","predicate":"belongs to","object":"forks desk","text":"stepfun-ai/vllm belongs to forks desk."},{"subject":"stepfun-ai/vllm","predicate":"has context","object":"forked from vllm-project/vllm","text":"stepfun-ai/vllm has context forked from vllm-project/vllm."},{"subject":"stepfun-ai/vllm","predicate":"has evidence coverage","object":"1 captured evidence page","text":"stepfun-ai/vllm has evidence coverage 1 captured evidence page."},{"subject":"stepfun-ai/vllm","predicate":"has captured page count","object":"1","text":"stepfun-ai/vllm has captured page count 1."},{"subject":"stepfun-ai/vllm","predicate":"has readable page count","object":"1","text":"stepfun-ai/vllm has readable page count 1."},{"subject":"stepfun-ai/vllm","predicate":"has related signal count","object":"1","text":"stepfun-ai/vllm has related signal count 1."},{"subject":"stepfun-ai/vllm","predicate":"has analysis playbook objective","object":"Turn fork activity into a map of upstream tools, libraries, model utilities, agent frameworks, and research dependencies being inspected or adapted.","text":"stepfun-ai/vllm has analysis playbook objective Turn fork activity into a map of upstream tools, libraries, model utilities, agent frameworks, and research dependencies being inspected or adapted.."},{"subject":"stepfun-ai/vllm","predicate":"has source host","object":"github.com","text":"stepfun-ai/vllm has source host github.com."},{"subject":"stepfun-ai/vllm","predicate":"has lab","object":"StepFun","text":"stepfun-ai/vllm has lab StepFun."},{"subject":"stepfun-ai/vllm","predicate":"has signal desk","object":"forks","text":"stepfun-ai/vllm has signal desk forks."},{"subject":"stepfun-ai/vllm","predicate":"has source host","object":"github.com","text":"stepfun-ai/vllm has source host github.com."},{"subject":"stepfun-ai/vllm","predicate":"has repository","object":"stepfun-ai/vllm","text":"stepfun-ai/vllm has repository stepfun-ai/vllm."},{"subject":"stepfun-ai/vllm","predicate":"has parent","object":"vllm-project/vllm","text":"stepfun-ai/vllm has parent vllm-project/vllm."},{"subject":"stepfun-ai/vllm","predicate":"has stars","object":"44","text":"stepfun-ai/vllm has stars 44."},{"subject":"stepfun-ai/vllm","predicate":"has notability","object":"Routine fork, low stars.","text":"stepfun-ai/vllm has notability Routine fork, low stars.."},{"subject":"stepfun-ai/vllm","predicate":"has watch term","object":"Model card","text":"stepfun-ai/vllm has watch term Model card."}]},"intelligence":{"signal_desk":"forks","answer":"StepFun forked stepfun-ai/vllm (forked from vllm-project/vllm). This fork signal points to upstream code the lab may be inspecting, patching, or building on. High-signal details: repo stepfun-ai/vllm · parent vllm-project/vllm · Routine fork, low stars.. onlylabs links this event to 1 captured evidence page and 1 related fork signal.","semantic_triples":[{"subject":"StepFun","predicate":"forked","object":"stepfun-ai/vllm","text":"StepFun forked stepfun-ai/vllm."},{"subject":"stepfun-ai/vllm","predicate":"is classified as","object":"fork signal","text":"stepfun-ai/vllm is classified as fork signal."},{"subject":"stepfun-ai/vllm","predicate":"belongs to","object":"forks desk","text":"stepfun-ai/vllm belongs to forks desk."},{"subject":"stepfun-ai/vllm","predicate":"has context","object":"forked from vllm-project/vllm","text":"stepfun-ai/vllm has context forked from vllm-project/vllm."},{"subject":"stepfun-ai/vllm","predicate":"has evidence coverage","object":"1 captured evidence page","text":"stepfun-ai/vllm has evidence coverage 1 captured evidence page."}]},"signal":{"id":"a14be8d5-87fe-47a5-8e4a-1ace1cebce42","url":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42","json_url":"https://onlylabs.fyi/signals/a14be8d5-87fe-47a5-8e4a-1ace1cebce42/signal.json","source_url":"https://github.com/stepfun-ai/vllm","title":"stepfun-ai/vllm","summary":"StepFun forked upstream code. onlylabs watches forks for tooling, infrastructure, research dependencies, and product-adjacent work.","context":"forked from 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src=\"https://raw.githubusercontent.com/vllm-project/vllm/main/docs/assets/logos/vllm-logo-text-light.png\" width=55%> </picture> </p> <h3 align=\"center\"> Easy, fast, and cheap LLM serving for everyone </h3> <p align=\"center\"> | <a href=\"https://docs.vllm.ai\"><b>Documentation</b></a> | <a href=\"https://blog.vllm.ai/\"><b>Blog</b></a> | <a href=\"https://arxiv.org/abs/2309.06180\"><b>Paper</b></a> | <a href=\"https://x.com/vllm_project\"><b>Twitter/X</b></a> | <a href=\"https://discuss.vllm.ai\"><b>User Forum</b></a> | <a href=\"https://slack.vllm.ai\"><b>Developer Slack</b></a> | </p> 🔥 We have built a vLLM website to help you get..."},"evidence_pages":[{"url":"https://github.com/stepfun-ai/vllm","final_url":"https://github.com/stepfun-ai/vllm","title":"stepfun-ai/vllm repository metadata","http_status":200,"content_type":"application/json","capture_method":"plain","fetched_at":"2026-06-11T02:54:23.367172+00:00","bytes":26239,"raw_path":"7d8e2e849757a141507e8bb45abe926458a081ba74c68075fb4c068fa12eb727.json","content_hash":"35daf017528806f5ba73f86a3e02cdc0b7041fa5678691911040a36fcfec5981","excerpt_chars":1200,"truncated":true,"excerpt":"stepfun-ai/vllm Description: A high-throughput and memory-efficient inference and serving engine for LLMs Language: Python License: Apache-2.0 Stars: 44 Forks: 12 Open issues: 3 Created: 2025-02-18T07:53:03Z Pushed: 2026-05-28T16:40:24Z Default branch: main Fork: yes Parent repository: vllm-project/vllm Archived: no README: <!-- markdownlint-disable MD001 MD041 --> <p align=\"center\"> <picture> <source media=\"(prefers-color-scheme: dark)\" srcset=\"https://raw.githubusercontent.com/vllm-project/vllm/main/docs/assets/logos/vllm-logo-text-dark.png\"> <img alt=\"vLLM\" src=\"https://raw.githubusercontent.com/vllm-project/vllm/main/docs/assets/logos/vllm-logo-text-light.png\" width=55%> </picture> </p> <h3 align=\"center\"> Easy, fast, and cheap LLM serving for everyone </h3> <p align=\"center\"> | <a href=\"https://docs.vllm.ai\"><b>Documentation</b></a> | <a href=\"https://blog.vllm.ai/\"><b>Blog</b></a> | <a href=\"https://arxiv.org/abs/2309.06180\"><b>Paper</b></a> | <a href=\"https://x.com/vllm_project\"><b>Twitter/X</b></a> | <a href=\"https://discuss.vllm.ai\"><b>User Forum</b></a> | <a href=\"https://slack.vllm.ai\"><b>Developer Slack</b></a> | </p> 🔥 We have built a vLLM website to help you get..."}],"related_signals":[{"id":"411e46af-07c9-427d-8522-f0502d830c66","url":"https://onlylabs.fyi/signals/411e46af-07c9-427d-8522-f0502d830c66","source_url":"https://github.com/stepfun-ai/llama.cpp","title":"stepfun-ai/llama.cpp","context":"forked from ggml-org/llama.cpp","kind":{"key":"repo_forked","label":"Fork"},"org":{"slug":"stepfun","name":"StepFun","category":"neolab"},"occurred_at":"2026-03-16T07:20:37+00:00","first_seen_at":"2026-06-05T20:58:53.52612+00:00","date_source":"source"}]}