[remote-controlled-man]

Fixes #2093

ResearchConductor.conduct_research() receives both URL-derived context and complementary web-search context as strings. The current implementation applies " ".join(...) to the complementary string, inserting spaces between every character before assigning the result to researcher.context.

This change joins the two non-empty context strings directly with a single boundary. It preserves the original URL context when complementary search returns no context and leaves the non-complementary path unchanged.

Verification:

• Added regression coverage for non-empty, empty, and disabled complementary search paths.
• Related offline suite: 15 passed.
• Python compilation checks passed.

🤖 Assisted by OpenAI Codex.

[Copilot]

🟢 Approval recommended

The change directly addresses the reported string-joining bug and includes targeted regression tests for the key behavioral branches.

Pull request overview

Fixes a bug in ResearchConductor.conduct_research() where complementary web-search context (a string) was mistakenly treated as an iterable of characters via " ".join(additional_research), corrupting the stored/returned research context.

Changes:

• Combine URL-derived context and complementary web-search context by joining the two non-empty strings with a single boundary.
• Add regression tests covering: non-empty complementary context, empty complementary result, and complementary search disabled.

File summaries

File	Description
gpt_researcher/skills/researcher.py	Fixes context concatenation to avoid character-splitting corruption and ensures a single boundary between non-empty parts.
tests/test_research_conductor_complement_context.py	Adds parametrized async regression coverage for the complementary-context concatenation behavior.

Review details

• Files reviewed: 2/2 changed files
• Comments generated: 0
• Review effort level: Lite

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[assafelovic]

Reviewed and tested: applied on current main individually and together with this round's other fixes, full offline suite green on Python 3.12 and 3.14, plus a live research run compared against main. Thank you!